Les fonctions pour les couleurs hsl

• hsl($hue, $saturation, $lightness) - Creates a Color from hue, saturation, and lightness values.
• hsla($hue, $saturation, $lightness, $alpha) - Creates a Color from hue, saturation, lightness, and alpha values.
• hue($color) - Gets the hue component of a color.
• saturation($color) - Gets the saturation component of a color.
• lightness($color) - Gets the lightness component of a color.
• 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.