FromCSSString creates a Color from a CSS color string (e.g., "rgba(255, 0, 0, 0.5)" or "rgb(255, 0, 0)").

FromHex creates a Color from a hexadecimal string (e.g., "#RRGGBB" or "#RRGGBBAA").

FromHSL creates a Color from HSL values (hue: 0-360, saturation: 0-1, lightness: 0-1).

NewColor creates a new Color but panics if the color is invalid.

NewColorWithErr creates a new Color but returns an error if the color is invalid.