color.adjust() Saturation color.adjust($color, $saturation: $amount)
color.adjust(, $saturation: [-100 ～ 100]%)
Convertible
- saturate($color, $amount) => color.adjust($color, $saturation: [0 ～ 100]%)
- desaturate($color, $amount) => color.adjust($color, $saturation: [0 ～ -100]%)