def _colors(strKey):
    """
    Function gives access to the RxCS console colors dictionary. The
    Function returns a proper console color formating string (ANSI colors)
    based on the key given to the function. |br|

    Available keys:

        'PURPLE'
        'BLUE'
        'GREEN'
        'YELLOW'
        'RED'
        'BLACK'
        'DARK_MAGENTA'
        'AQUA'
        'BLUE_BG'
        'DARK_BLUE'
        'DARK_GREEN'
        'GREY30'
        'GREY70'

        'PROGRESS'          -> color for progress signs ('>>>', '>>', '>')
        'INFO'              -> color for info messages
        'BULLET_INFO'       -> color for bullet info messages
        'BULLET'            -> color for bullets ('*')
        'WARN'              -> color for warning messages
        'PARAM'             -> color for parameters printing
        'OK'                -> color for good messages
        'ENDC'              -> console formatting string which switches of
                               the coloring

    Args:
        strKey (string): key of the color

    Returns:
        strColor (string): console color formating string
    """

    # Define colors
    dColors = {}
    dColors['PURPLE'] = '\033[95m'
    dColors['BLUE'] = '\033[94m'
    dColors['GREEN'] = '\033[92m'
    dColors['YELLOW'] = '\033[93m'
    dColors['RED'] = '\033[91m'
    dColors['BLACK'] = '\033[30m'
    dColors['DARK_MAGENTA'] = '\033[35m'
    dColors['AQUA'] = '\033[96m'
    dColors['BLUE_BG'] = '\033[44m'
    dColors['DARK_BLUE'] = '\033[34m'
    dColors['DARK_GREEN'] = '\033[32m'
    dColors['GREY30'] = '\033[30m'
    dColors['GREY70'] = '\033[97m'

    # Define colors for communication
    dColors['PROGRESS'] = dColors['DARK_MAGENTA']
    dColors['INFO'] = dColors['DARK_GREEN']
    dColors['BULLET_INFO'] = dColors['AQUA']
    dColors['BULLET'] = dColors['DARK_MAGENTA']
    dColors['WARN'] = dColors['RED']
    dColors['PARAM'] = dColors['AQUA']
    dColors['OK'] = dColors['DARK_GREEN']
    dColors['ENDC'] = '\033[0m'

    # Return the correct color
    strColor = dColors[strKey]
    return strColor