[转]Manipulate color with Sass functions

https://makandracards.com/makandra/1288-manipulate-color-with-sass-functions

adjust-hue($color, $degrees)

Changes the hue of a color.

lighten($color, $amount)

Makes a color lighter.

darken($color, $amount)

Makes a color darker.

saturate($color, $amount)

Makes a color more saturated.

desaturate($color, $amount)

Makes a color less saturated.

grayscale($color)

Converts a color to grayscale.

complement($color)

Returns the complement of a color.

invert($color)

Returns the inverse of a color.