Python colorsys.hls_to_rgb() Examples

def colorize(z):
    n, m = z.shape
    c = np.zeros((n, m, 3))
    c[np.isinf(z)] = (1.0, 1.0, 1.0)
    c[np.isnan(z)] = (0.5, 0.5, 0.5)

    idx = ~(np.isinf(z) + np.isnan(z))
    A = (np.angle(z[idx]) + np.pi) / (2*np.pi)
    A = (A + 0.5) % 1.0
    B = 1.0/(1.0 + abs(z[idx])**0.3)
    c[idx] = [hls_to_rgb(a, b, 0.8) for a, b in zip(A, B)]
    return c

###############################################################################
# Bandpass filters
# ----------------
# First, we display each wavelet according to its scale and orientation. 

def test_hls_values(self):
        values = [
            # rgb, hls
            ((0.0, 0.0, 0.0), (  0  , 0.0, 0.0)), # black
            ((0.0, 0.0, 1.0), (4./6., 0.5, 1.0)), # blue
            ((0.0, 1.0, 0.0), (2./6., 0.5, 1.0)), # green
            ((0.0, 1.0, 1.0), (3./6., 0.5, 1.0)), # cyan
            ((1.0, 0.0, 0.0), (  0  , 0.5, 1.0)), # red
            ((1.0, 0.0, 1.0), (5./6., 0.5, 1.0)), # purple
            ((1.0, 1.0, 0.0), (1./6., 0.5, 1.0)), # yellow
            ((1.0, 1.0, 1.0), (  0  , 1.0, 0.0)), # white
            ((0.5, 0.5, 0.5), (  0  , 0.5, 0.0)), # grey
        ]
        for (rgb, hls) in values:
            self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb))
            self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) 

def get_selected_fcurves_colors(selected_objects_types, sepcific_obj_name='', exclude=()):
    import colorsys
    if not isinstance(selected_objects_types, Iterable):
        selected_objects_types = [selected_objects_types]
    selected_objects = [obj for obj in bpy.context.scene.objects if obj.select if
                        check_obj_type(obj.name) in selected_objects_types]
    selected_objects = [obj for obj in selected_objects if obj.animation_data is not None and
                        obj.name not in exclude][::-1]
    if len(selected_objects) == 0:
        return []
    selected_objects_len = 6 if len(selected_objects) <= 6 else len(selected_objects)
    Hs = np.linspace(0, 360, selected_objects_len + 1)[:-1] / 360
    obj_colors = [colorsys.hls_to_rgb(Hs[obj_ind], 0.5, 1) for obj_ind, obj in enumerate(selected_objects)]
    if sepcific_obj_name != '':
        selected_objects_names = [o.name for o in selected_objects]
        if sepcific_obj_name in selected_objects_names:
            return obj_colors[selected_objects_names.index(sepcific_obj_name)]
    return obj_colors 

def test_hls_values(self):
        values = [
            # rgb, hls
            ((0.0, 0.0, 0.0), (  0  , 0.0, 0.0)), # black
            ((0.0, 0.0, 1.0), (4./6., 0.5, 1.0)), # blue
            ((0.0, 1.0, 0.0), (2./6., 0.5, 1.0)), # green
            ((0.0, 1.0, 1.0), (3./6., 0.5, 1.0)), # cyan
            ((1.0, 0.0, 0.0), (  0  , 0.5, 1.0)), # red
            ((1.0, 0.0, 1.0), (5./6., 0.5, 1.0)), # purple
            ((1.0, 1.0, 0.0), (1./6., 0.5, 1.0)), # yellow
            ((1.0, 1.0, 1.0), (  0  , 1.0, 0.0)), # white
            ((0.5, 0.5, 0.5), (  0  , 0.5, 0.0)), # grey
        ]
        for (rgb, hls) in values:
            self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb))
            self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) 

def random_color():
    import random, colorsys
    
    red = (random.randrange(0, 256) + 256) / 2.0;
    green = (random.randrange(0, 256) + 256) / 2.0;
    blue = (random.randrange(0, 256) + 256) / 2.0;
    
    def to_hex(i):
        hx = hex(int(i))[2:]
        if len(hx) == 1:
            hx = "0" + hx
        return hx
    def to_color(r,g,b):
        cs = [to_hex(c) for c in [r,g,b]]
        return "#{cs[0]}{cs[1]}{cs[2]}".format(cs=cs)
    def darker(r,g,b):
        h,l,s = colorsys.rgb_to_hls(r/256.0, g/256.0, b/256.0)
        cs = [to_hex(256.0*c) for c in colorsys.hls_to_rgb(h,l/2.5,s)]
        return "#{cs[0]}{cs[1]}{cs[2]}".format(cs=cs)
    
    return {"background":to_color(red,green,blue),"foreground":darker(red,green,blue)} 

def parse_hsl(h: str, h_units: str, sat: str, light: str, alpha: Optional[float] = None) -> RGBA:
    """
    Parse raw hue, saturation, lightness and alpha values and convert to RGBA.
    """
    s_value, l_value = parse_color_value(sat, 100), parse_color_value(light, 100)

    h_value = float(h)
    if h_units in {None, 'deg'}:
        h_value = h_value % 360 / 360
    elif h_units == 'rad':
        h_value = h_value % rads / rads
    else:
        # turns
        h_value = h_value % 1

    r, g, b = hls_to_rgb(h_value, l_value, s_value)
    return RGBA(r, g, b, alpha) 

def shift(color, amount):
  r, g, b, a = color

  print(("rgb", r, g, b, a))

  h, l, s = colorsys.rgb_to_hls(r, g, b)
  print(("hls", h, l, s))
  h *= 360
  h += int(amount)
  h %= 360
  h /= 360.0
  print(("hls", h, l, s))

  r, g, b = colorsys.hls_to_rgb(h, l, s)

  print(("rgb", int(r), int(g), int(b), a))

  return (int(r), int(g), int(b), a) 

def gen_color(self):
        """Generate a color.

        Returns:
            (int): The return value is an rgb color.
        """
        
        if self.n_assigned_colors < len(self.preferred_colors):
            hue = self.preferred_colors[self.n_assigned_colors][0]
            sat = self.preferred_colors[self.n_assigned_colors][1]
            self.n_assigned_colors += 1
        else:
            hue = random.random()
            sat = random.random()

        rgb = colorsys.hls_to_rgb(hue, self._LIGHTNESS, sat)

        return ColorCore.rgb_to_int(rgb) 

def test_hls_values(self):
        values = [
            # rgb, hls
            ((0.0, 0.0, 0.0), (  0  , 0.0, 0.0)), # black
            ((0.0, 0.0, 1.0), (4./6., 0.5, 1.0)), # blue
            ((0.0, 1.0, 0.0), (2./6., 0.5, 1.0)), # green
            ((0.0, 1.0, 1.0), (3./6., 0.5, 1.0)), # cyan
            ((1.0, 0.0, 0.0), (  0  , 0.5, 1.0)), # red
            ((1.0, 0.0, 1.0), (5./6., 0.5, 1.0)), # purple
            ((1.0, 1.0, 0.0), (1./6., 0.5, 1.0)), # yellow
            ((1.0, 1.0, 1.0), (  0  , 1.0, 0.0)), # white
            ((0.5, 0.5, 0.5), (  0  , 0.5, 0.0)), # grey
        ]
        for (rgb, hls) in values:
            self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb))
            self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) 

def save(self, *args, **kwargs):
        if self.color is None:
            values = []
            for r in Resource.objects.filter(color__isnull=False):
                color = [int(r.color[i:i + 2], 16) / 255. for i in range(1, 6, 2)]
                h, _, _ = colorsys.rgb_to_hls(*color)
                values.append(h)
            values.sort()

            if values:
                prv = values[-1] - 1
            opt = 0, 0
            for val in values:
                delta, middle, prv = val - prv, (val + prv) * .5, val
                opt = max(opt, (delta, middle))
            h = opt[1] % 1
            color = colorsys.hls_to_rgb(h, .6, .5)

            self.color = '#' + ''.join(f'{int(c * 255):02x}' for c in color).upper()

        super().save(*args, **kwargs) 

def test_hls_values(self):
        values = [
            # rgb, hls
            ((0.0, 0.0, 0.0), (  0  , 0.0, 0.0)), # black
            ((0.0, 0.0, 1.0), (4./6., 0.5, 1.0)), # blue
            ((0.0, 1.0, 0.0), (2./6., 0.5, 1.0)), # green
            ((0.0, 1.0, 1.0), (3./6., 0.5, 1.0)), # cyan
            ((1.0, 0.0, 0.0), (  0  , 0.5, 1.0)), # red
            ((1.0, 0.0, 1.0), (5./6., 0.5, 1.0)), # purple
            ((1.0, 1.0, 0.0), (1./6., 0.5, 1.0)), # yellow
            ((1.0, 1.0, 1.0), (  0  , 1.0, 0.0)), # white
            ((0.5, 0.5, 0.5), (  0  , 0.5, 0.0)), # grey
        ]
        for (rgb, hls) in values:
            self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb))
            self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) 

def test_hls_values(self):
        values = [
            # rgb, hls
            ((0.0, 0.0, 0.0), (  0  , 0.0, 0.0)), # black
            ((0.0, 0.0, 1.0), (4./6., 0.5, 1.0)), # blue
            ((0.0, 1.0, 0.0), (2./6., 0.5, 1.0)), # green
            ((0.0, 1.0, 1.0), (3./6., 0.5, 1.0)), # cyan
            ((1.0, 0.0, 0.0), (  0  , 0.5, 1.0)), # red
            ((1.0, 0.0, 1.0), (5./6., 0.5, 1.0)), # purple
            ((1.0, 1.0, 0.0), (1./6., 0.5, 1.0)), # yellow
            ((1.0, 1.0, 1.0), (  0  , 1.0, 0.0)), # white
            ((0.5, 0.5, 0.5), (  0  , 0.5, 0.0)), # grey
        ]
        for (rgb, hls) in values:
            self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb))
            self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) 

def test_hls_values(self):
        values = [
            # rgb, hls
            ((0.0, 0.0, 0.0), (  0  , 0.0, 0.0)), # black
            ((0.0, 0.0, 1.0), (4./6., 0.5, 1.0)), # blue
            ((0.0, 1.0, 0.0), (2./6., 0.5, 1.0)), # green
            ((0.0, 1.0, 1.0), (3./6., 0.5, 1.0)), # cyan
            ((1.0, 0.0, 0.0), (  0  , 0.5, 1.0)), # red
            ((1.0, 0.0, 1.0), (5./6., 0.5, 1.0)), # purple
            ((1.0, 1.0, 0.0), (1./6., 0.5, 1.0)), # yellow
            ((1.0, 1.0, 1.0), (  0  , 1.0, 0.0)), # white
            ((0.5, 0.5, 0.5), (  0  , 0.5, 0.0)), # grey
        ]
        for (rgb, hls) in values:
            self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb))
            self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) 

def test_hls_values(self):
        values = [
            # rgb, hls
            ((0.0, 0.0, 0.0), (  0  , 0.0, 0.0)), # black
            ((0.0, 0.0, 1.0), (4./6., 0.5, 1.0)), # blue
            ((0.0, 1.0, 0.0), (2./6., 0.5, 1.0)), # green
            ((0.0, 1.0, 1.0), (3./6., 0.5, 1.0)), # cyan
            ((1.0, 0.0, 0.0), (  0  , 0.5, 1.0)), # red
            ((1.0, 0.0, 1.0), (5./6., 0.5, 1.0)), # purple
            ((1.0, 1.0, 0.0), (1./6., 0.5, 1.0)), # yellow
            ((1.0, 1.0, 1.0), (  0  , 1.0, 0.0)), # white
            ((0.5, 0.5, 0.5), (  0  , 0.5, 0.0)), # grey
        ]
        for (rgb, hls) in values:
            self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb))
            self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) 

def test_hls_values(self):
        values = [
            # rgb, hls
            ((0.0, 0.0, 0.0), (  0  , 0.0, 0.0)), # black
            ((0.0, 0.0, 1.0), (4./6., 0.5, 1.0)), # blue
            ((0.0, 1.0, 0.0), (2./6., 0.5, 1.0)), # green
            ((0.0, 1.0, 1.0), (3./6., 0.5, 1.0)), # cyan
            ((1.0, 0.0, 0.0), (  0  , 0.5, 1.0)), # red
            ((1.0, 0.0, 1.0), (5./6., 0.5, 1.0)), # purple
            ((1.0, 1.0, 0.0), (1./6., 0.5, 1.0)), # yellow
            ((1.0, 1.0, 1.0), (  0  , 1.0, 0.0)), # white
            ((0.5, 0.5, 0.5), (  0  , 0.5, 0.0)), # grey
        ]
        for (rgb, hls) in values:
            self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb))
            self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) 

def make_colors(
        self, node
    ):  # return (group number, fill color, text color)
        if self.colored:
            idx, H = self.get(node)
            L = max([1.0 - 0.1 * node.get_level(), 0.1])
            S = 1.0
            A = 0.7  # make nodes translucent (to handle possible overlaps)
            fill_RGBA = self.htmlize_rgb(*colorsys.hls_to_rgb(H, L, S), A = A)

            # black text on light nodes, white text on (very) dark nodes.
            text_RGB = '#000000' if L >= 0.5 else '#ffffff'
        else:
            idx, _ = self.get(node)
            fill_RGBA = self.htmlize_rgb(1.0, 1.0, 1.0, 0.7)
            text_RGB = '#000000'
        return idx, fill_RGBA, text_RGB 

def lighten_color(color, amount=0.5):
    """
    Lightens the given color by multiplying (1-luminosity) by the given amount.
    Input can be matplotlib color string, hex string, or RGB tuple.

    Examples:
    >> lighten_color('g', 0.3)
    >> lighten_color('#F034A3', 0.6)
    >> lighten_color((.3,.55,.1), 0.5)
    """
    import matplotlib.colors as mc
    import colorsys
    try:
        c = mc.cnames[color]
    except:
        c = color
    c = colorsys.rgb_to_hls(*mc.to_rgb(c))
    return colorsys.hls_to_rgb(c[0], 1 - amount * (1 - c[1]), c[2]) 

def darken_color(color, amount=0.5):
    """
    Darkens the given color by multiplying luminosity by the given amount.
    Input can be matplotlib color string, hex string, or RGB tuple.

    Examples:
    >> lighten_color('g', 0.3)
    >> lighten_color('#F034A3', 0.6)
    >> lighten_color((.3,.55,.1), 0.5)
    """
    import matplotlib.colors as mc
    import colorsys
    try:
        c = mc.cnames[color]
    except:
        c = color
    c = colorsys.rgb_to_hls(*mc.to_rgb(c))
    return colorsys.hls_to_rgb(c[0], amount * c[1], c[2]) 

def from_hsl(h: int, s: int, l: int) -> "Color":
        """Creates a Color object from hue, saturation and luminance

        :param h: Hue
        :param s: Saturation
        :param l: Luminance
        :return: New Color object
        """
        components = (360, h, "h"), (100, l, "l"), (100, s, "s")

        for bound, component, name in components:
            if not 0 <= component <= bound:
                raise ValueError(f"{name} is outside of [0, {bound}]: {component}")

        rgb = hls_to_rgb(*(component / bound for bound, component, name in components))

        return Color(int_tuple(component * 255 for component in rgb)) 

def _change_color_brightness(self, color, brightness_factor):
        """
        Depending on the brightness_factor, gives a lighter or darker color i.e. a color with
        less or more saturation than the original color.

        Args:
            color: color of the polygon. Refer to `matplotlib.colors` for a full list of
                formats that are accepted.
            brightness_factor (float): a value in [-1.0, 1.0] range. A lightness factor of
                0 will correspond to no change, a factor in [-1.0, 0) range will result in
                a darker color and a factor in (0, 1.0] range will result in a lighter color.

        Returns:
            modified_color (tuple[double]): a tuple containing the RGB values of the
                modified color. Each value in the tuple is in the [0.0, 1.0] range.
        """
        assert brightness_factor >= -1.0 and brightness_factor <= 1.0
        color = mplc.to_rgb(color)
        polygon_color = colorsys.rgb_to_hls(*mplc.to_rgb(color))
        modified_lightness = polygon_color[1] + (brightness_factor * polygon_color[1])
        modified_lightness = 0.0 if modified_lightness < 0.0 else modified_lightness
        modified_lightness = 1.0 if modified_lightness > 1.0 else modified_lightness
        modified_color = colorsys.hls_to_rgb(polygon_color[0], modified_lightness, polygon_color[2])
        return modified_color 

def make_icon(template, color):
        """
        Create an icon for the specified user color. It will be used to
        generate on the fly an icon representing the user.
        """
        # Get a light and dark version of the user color
        r, g, b = StatusWidget.ida_to_python(color)
        h, l, s = colorsys.rgb_to_hls(r, g, b)
        r, g, b = colorsys.hls_to_rgb(h, 0.5, 1.0)
        light = StatusWidget.python_to_qt(r, g, b)
        r, g, b = colorsys.hls_to_rgb(h, 0.25, 1.0)
        dark = StatusWidget.python_to_qt(r, g, b)

        # Replace the icon pixel with our two colors
        image = QImage(template)
        for x in range(image.width()):
            for y in range(image.height()):
                c = image.pixel(x, y)
                if (c & 0xFFFFFF) == 0xFFFFFF:
                    image.setPixel(x, y, light)
                if (c & 0xFFFFFF) == 0x000000:
                    image.setPixel(x, y, dark)
        return QPixmap(image) 

def test_hls_values(self):
        values = [
            # rgb, hls
            ((0.0, 0.0, 0.0), (  0  , 0.0, 0.0)), # black
            ((0.0, 0.0, 1.0), (4./6., 0.5, 1.0)), # blue
            ((0.0, 1.0, 0.0), (2./6., 0.5, 1.0)), # green
            ((0.0, 1.0, 1.0), (3./6., 0.5, 1.0)), # cyan
            ((1.0, 0.0, 0.0), (  0  , 0.5, 1.0)), # red
            ((1.0, 0.0, 1.0), (5./6., 0.5, 1.0)), # purple
            ((1.0, 1.0, 0.0), (1./6., 0.5, 1.0)), # yellow
            ((1.0, 1.0, 1.0), (  0  , 1.0, 0.0)), # white
            ((0.5, 0.5, 0.5), (  0  , 0.5, 0.0)), # grey
        ]
        for (rgb, hls) in values:
            self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb))
            self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) 

def test_hls_values(self):
        values = [
            # rgb, hls
            ((0.0, 0.0, 0.0), (  0  , 0.0, 0.0)), # black
            ((0.0, 0.0, 1.0), (4./6., 0.5, 1.0)), # blue
            ((0.0, 1.0, 0.0), (2./6., 0.5, 1.0)), # green
            ((0.0, 1.0, 1.0), (3./6., 0.5, 1.0)), # cyan
            ((1.0, 0.0, 0.0), (  0  , 0.5, 1.0)), # red
            ((1.0, 0.0, 1.0), (5./6., 0.5, 1.0)), # purple
            ((1.0, 1.0, 0.0), (1./6., 0.5, 1.0)), # yellow
            ((1.0, 1.0, 1.0), (  0  , 1.0, 0.0)), # white
            ((0.5, 0.5, 0.5), (  0  , 0.5, 0.0)), # grey
        ]
        for (rgb, hls) in values:
            self.assertTripleEqual(hls, colorsys.rgb_to_hls(*rgb))
            self.assertTripleEqual(rgb, colorsys.hls_to_rgb(*hls)) 

def _change_color_brightness(self, color, brightness_factor):
        """
        Depending on the brightness_factor, gives a lighter or darker color i.e. a color with
        less or more saturation than the original color.

        Args:
            color: color of the polygon. Refer to `matplotlib.colors` for a full list of
                formats that are accepted.
            brightness_factor (float): a value in [-1.0, 1.0] range. A lightness factor of
                0 will correspond to no change, a factor in [-1.0, 0) range will result in
                a darker color and a factor in (0, 1.0] range will result in a lighter color.

        Returns:
            modified_color (tuple[double]): a tuple containing the RGB values of the
                modified color. Each value in the tuple is in the [0.0, 1.0] range.
        """
        assert brightness_factor >= -1.0 and brightness_factor <= 1.0
        color = mplc.to_rgb(color)
        polygon_color = colorsys.rgb_to_hls(*mplc.to_rgb(color))
        modified_lightness = polygon_color[1] + (brightness_factor * polygon_color[1])
        modified_lightness = 0.0 if modified_lightness < 0.0 else modified_lightness
        modified_lightness = 1.0 if modified_lightness > 1.0 else modified_lightness
        modified_color = colorsys.hls_to_rgb(polygon_color[0], modified_lightness, polygon_color[2])
        return modified_color 

def _get_colors(num_colors):
	colors=[]
	for i in np.arange(0., 360., 360. / num_colors):
		hue = i/360.
		lightness = (50 + np.random.rand() * 10)/100.
		saturation = (90 + np.random.rand() * 10)/100.
		colors.append(colorsys.hls_to_rgb(hue, lightness, saturation))
	return colors

#colors = ['g','c','r','b','m','k','y',"orange",'indigo','salmon','crimson','hotpink','saddlebrown','lightgreen','yellowgreen','peru','gray','darkred'] 

def fromhls(self, h, l, s):
        """Convert to `RGB` from `HSL`."""

        r, g, b = hls_to_rgb(h, l, s)
        self.r = clamp(round_int(r * 255.0), 0, 255)
        self.g = clamp(round_int(g * 255.0), 0, 255)
        self.b = clamp(round_int(b * 255.0), 0, 255) 

def get_distinct_colors(colors_num=1):
    hs = get_distinct_colors_hs(colors_num)
    return [colorsys.hls_to_rgb(hs[ind], 0.5, 1) for ind in range(colors_num)] 

def parse_hls(data):
    """
    Parses HLS color bytes and returns fill style list.
    """
    h = word2py_int(data[0:2]) / 360.0
    l = ord(data[2]) / 255.0
    s = ord(data[3]) / 255.0
    r, g, b = hls_to_rgb(h, l, s)
    return [uc2const.COLOR_RGB, [r, g, b], 1.0, ''] 

def colorFromAngle2(angle, h=136, s=118, maxx = 0.8):
    """
    Converts simple numbers into colors using HSL color scale. This can be used to shade surfaces more exposed to light brighter.
    args:
        angle: Higher values of this argument correspond to brighter colors. If a plane of a polyhedron makes a large angle with a light source,
                it will look brighter.
    """
    l = 96+64*angle/maxx #/450
    r, g, b = colorsys.hls_to_rgb(h/255.0, l/255.0, s/255.0)
    r, g, b = [x*255.0 for x in (r, g, b)]
    return (int(r),int(g),int(b)) 

def test_hls_roundtrip(self):
        for r in frange(0.0, 1.0, 0.2):
            for g in frange(0.0, 1.0, 0.2):
                for b in frange(0.0, 1.0, 0.2):
                    rgb = (r, g, b)
                    self.assertTripleEqual(
                        rgb,
                        colorsys.hls_to_rgb(*colorsys.rgb_to_hls(*rgb))
                    )