Java Regx to parse RGBA Color Values

String keywords_color_regex = "^[a-z]*$";
    String hex_color_regex = "^#[0-9a-f]{3}([0-9a-f]{3})?$";
    String rgb_color_regex = "^rgb\\(\\s*(0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*\\)$";
    String rgba_color_regex = "^rgba\\(\\s*(0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*(0|[1-9]\\d?|1\\d\\d?|2[0-4]\\d|25[0-5])\\s*,\\s*((0.[1-9])|[01])\\s*\\)$";
    String hsl_color_regex = "^hsl\\(\\s*(0|[1-9]\\d?|[12]\\d\\d|3[0-5]\\d)\\s*,\\s*((0|[1-9]\\d?|100)%)\\s*,\\s*((0|[1-9]\\d?|100)%)\\s*\\)$";

Source : http://stackoverflow.com/questions/12385500/regex-pattern-for-rgb-rgba-hsl-hsla-color-coding