This resource returns all dyes in the game, including localized names
    and their color component information.

    :param lang: The language to query the names for.

    The response is a dictionary where color ids are mapped to an dictionary
    containing the following properties:

    name (string):
        The name of the dye.

    base_rgb (list):
        The base RGB values.

    cloth (object):
        Detailed information on its appearance when applied on cloth armor.

    leather (object):
        Detailed information on its appearance when applied on leather armor.

    metal (object):
        Detailed information on its appearance when applied on metal armor.

    The detailed information object contains the following properties:

    brightness (number):
        The brightness.

    contrast (number):
        The contrast.

    hue (number):
        The hue in the HSL colorspace.

    saturation (number):
        The saturation in the HSL colorspace.

    lightness (number):
        The lightness in the HSL colorspace.

    rgb (list):
        A list containing precalculated RGB values.

def colors(lang="en"):
    """This resource returns all dyes in the game, including localized names
    and their color component information.

    :param lang: The language to query the names for.

    The response is a dictionary where color ids are mapped to an dictionary
    containing the following properties:

    name (string):
        The name of the dye.

    base_rgb (list):
        The base RGB values.

    cloth (object):
        Detailed information on its appearance when applied on cloth armor.

    leather (object):
        Detailed information on its appearance when applied on leather armor.

    metal (object):
        Detailed information on its appearance when applied on metal armor.

    The detailed information object contains the following properties:

    brightness (number):
        The brightness.

    contrast (number):
        The contrast.

    hue (number):
        The hue in the HSL colorspace.

    saturation (number):
        The saturation in the HSL colorspace.

    lightness (number):
        The lightness in the HSL colorspace.

    rgb (list):
        A list containing precalculated RGB values.

    """
    cache_name = "colors.%s.json" % lang
    data = get_cached("colors.json", cache_name, params=dict(lang=lang))
    return data["colors"]