def lighten(color: QtGui.QColor, amount: float=0.1):
h, s, l, a = color.getHslF()
lightness = amount + l
if lightness > 1:
lightness = 1
return QtGui.QColor.fromHslF(h, s, lightness, a)
def transparentize(color: QtGui.QColor, amount: float):
h, s, l, a = color.getHslF()
alpha = a - amount if a - amount > 0 else 0
return QtGui.QColor.fromHslF(h, s, l, alpha)
def desaturate(color: QtGui.QColor, amount: float=0.1):
h, s, l, a = color.getHslF()
saturation = s - amount if s - amount > 0 else 0
return QtGui.QColor.fromHslF(h, saturation, l, a)
def darken(color: QtGui.QColor, amount: float=0.1):
h, s, l, a = color.getHslF()
lightness = l - amount if l-amount > 0 else 0
return QtGui.QColor.fromHslF(h, s, lightness, a)