Built-in functions

Stylus comes with a large number of built-in functions to perform common operations on objects, especially related to CSS.

The following is a list of some useful in-built functions:

Function	Description
red(color)	Returns the red component of the color
green(color)	Returns the green component of the color
blue(color)	Returns the blue component of the color
alpha(color)	Returns the alpha component of the color
dark(color)	Checks if the color is dark
light(color)	Checks if the color is light
hue(color)	Returns the hue of the color
saturation(color)	Returns the saturation of the color
lightness(color)	Returns the lightness of the color
invert(color)	Inverts the color
saturate(color, amount)	Saturates the color by the given amount
desaturate(color, amount)	Desaturates the color by the given amount
lighten(color, amount)	Lightens the color by the given amount
darken(color, amount)	Darkens the color by the given amount ...