def adjust_color(
color, red=None, green=None, blue=None,
hue=None, saturation=None, lightness=None, alpha=None):
do_rgb = red or green or blue
do_hsl = hue or saturation or lightness
if do_rgb and do_hsl:
raise ValueError(
"Can't adjust both RGB and HSL channels at the same time")
zero = Number(0)
a = color.alpha + (alpha or zero).value
if do_rgb:
r, g, b = color.rgba[:3]
channels = [
current + (adjustment or zero).value / 255
for (current, adjustment) in zip(color.rgba, (red, green, blue))]
return Color.from_rgb(*channels, alpha=a)
else:
h, s, l = color.hsl
h = (h + (hue or zero).value / 360) % 1
s += _interpret_percentage(saturation or zero, relto=100, clamp=False)
l += _interpret_percentage(lightness or zero, relto=100, clamp=False)
return Color.from_hsl(h, s, l, a)
def adjust_color(
color, red=None, green=None, blue=None,
hue=None, saturation=None, lightness=None, alpha=None):
do_rgb = red or green or blue
do_hsl = hue or saturation or lightness
if do_rgb and do_hsl:
raise ValueError(
"Can't adjust both RGB and HSL channels at the same time")
zero = Number(0)
a = color.alpha + (alpha or zero).value
if do_rgb:
r, g, b = color.rgba[:3]
channels = [
current + (adjustment or zero).value / 255
for (current, adjustment) in zip(color.rgba, (red, green, blue))]
return Color.from_rgb(*channels, alpha=a)
else:
h, s, l = color.hsl
h = (h + (hue or zero).value / 360) % 1
s += _interpret_percentage(saturation or zero, relto=100, clamp=False)
l += _interpret_percentage(lightness or zero, relto=100, clamp=False)
return Color.from_hsl(h, s, l, a)
def change_color(color, red=None, green=None, blue=None, hue=None, saturation=None, lightness=None, alpha=None):
do_rgb = red or green or blue
do_hsl = hue or saturation or lightness
if do_rgb and do_hsl:
raise ValueError("Can't change both RGB and HSL channels at the same time")
if alpha is None:
alpha = color.alpha
else:
alpha = alpha.value
if do_rgb:
channels = list(color.rgba[:3])
if red:
channels[0] = _interpret_percentage(red, relto=255)
if green:
channels[1] = _interpret_percentage(green, relto=255)
if blue:
channels[2] = _interpret_percentage(blue, relto=255)
return Color.from_rgb(*channels, alpha=alpha)
else:
channels = list(color.hsl)
if hue:
expect_type(hue, Number, unit=None)
channels[0] = (hue.value / 360) % 1
# Ruby sass treats plain numbers for saturation and lightness as though
# they were percentages, just without the %
if saturation:
channels[1] = _interpret_percentage(saturation, relto=100)
if lightness:
channels[2] = _interpret_percentage(lightness, relto=100)
return Color.from_hsl(*channels, alpha=alpha)
def scale_color(color,
red=None,
green=None,
blue=None,
saturation=None,
lightness=None,
alpha=None):
do_rgb = red or green or blue
do_hsl = saturation or lightness
if do_rgb and do_hsl:
raise ValueError(
"Can't scale both RGB and HSL channels at the same time")
scaled_alpha = _scale_channel(color.alpha, alpha)
if do_rgb:
channels = [
_scale_channel(channel, scaleby)
for channel, scaleby in zip(color.rgba, (red, green, blue))
]
return Color.from_rgb(*channels, alpha=scaled_alpha)
else:
channels = [
_scale_channel(channel, scaleby)
for channel, scaleby in zip(color.hsl, (None, saturation,
lightness))
]
return Color.from_hsl(*channels, alpha=scaled_alpha)
def change_color(color, red=None, green=None, blue=None, hue=None, saturation=None, lightness=None, alpha=None):
do_rgb = red or green or blue
do_hsl = hue or saturation or lightness
if do_rgb and do_hsl:
raise ValueError("Can't change both RGB and HSL channels at the same time")
if alpha is None:
alpha = color.alpha
else:
alpha = alpha.value
if do_rgb:
channels = list(color.rgba[:3])
if red:
channels[0] = _interpret_percentage(red, relto=255)
if green:
channels[1] = _interpret_percentage(green, relto=255)
if blue:
channels[2] = _interpret_percentage(blue, relto=255)
return Color.from_rgb(*channels, alpha=alpha)
else:
channels = list(color.hsl)
if hue:
expect_type(hue, Number, unit=None)
channels[0] = (hue.value / 360) % 1
# Ruby sass treats plain numbers for saturation and lightness as though
# they were percentages, just without the %
if saturation:
channels[1] = _interpret_percentage(saturation, relto=100)
if lightness:
channels[2] = _interpret_percentage(lightness, relto=100)
return Color.from_hsl(*channels, alpha=alpha)
def hsla(h, s, l, a):
return Color.from_hsl(
h.value / 360 % 1,
# Ruby sass treats plain numbers for saturation and lightness as though
# they were percentages, just without the %
_interpret_percentage(s, relto=100),
_interpret_percentage(l, relto=100),
alpha=a.value,
)
def hsla(h, s, l, a):
return Color.from_hsl(
h.value / 360 % 1,
# Ruby sass treats plain numbers for saturation and lightness as though
# they were percentages, just without the %
_interpret_percentage(s, relto=100),
_interpret_percentage(l, relto=100),
alpha=a.value,
)
def scale_color(color, red=None, green=None, blue=None, saturation=None, lightness=None, alpha=None):
do_rgb = red or green or blue
do_hsl = saturation or lightness
if do_rgb and do_hsl:
raise ValueError("Can't scale both RGB and HSL channels at the same time")
scaled_alpha = _scale_channel(color.alpha, alpha)
if do_rgb:
channels = [_scale_channel(channel, scaleby) for channel, scaleby in zip(color.rgba, (red, green, blue))]
return Color.from_rgb(*channels, alpha=scaled_alpha)
else:
channels = [
_scale_channel(channel, scaleby) for channel, scaleby in zip(color.hsl, (None, saturation, lightness))
]
return Color.from_hsl(*channels, alpha=scaled_alpha)
def complement(color):
h, s, l = color.hsl
return Color.from_hsl((h + 0.5) % 1, s, l, alpha=color.alpha)
def adjust_hue(color, degrees):
h, s, l = color.hsl
delta = degrees.value / 360
return Color.from_hsl((h + delta) % 1, s, l, alpha=color.alpha)
def greyscale(color):
h, s, l = color.hsl
return Color.from_hsl(h, 0, l, alpha=color.alpha)
def complement(color):
h, s, l = color.hsl
return Color.from_hsl((h + 0.5) % 1, s, l, alpha=color.alpha)
def adjust_hue(color, degrees):
h, s, l = color.hsl
delta = degrees.value / 360
return Color.from_hsl((h + delta) % 1, s, l, alpha=color.alpha)
def greyscale(color):
h, s, l = color.hsl
return Color.from_hsl(h, 0, l, alpha=color.alpha)
