def ChargeColorMapping(maptype='jet', reverse=False):
    """Maps amino-acid charge at neutral pH to colors. 
    Currently does not use the keyword arguments for *maptype*
    or *reverse* but accepts these arguments to be consistent
    with KyteDoolittleColorMapping and MWColorMapping for now."""
    pos_color = '#FF0000'
    neg_color = '#0000FF'
    neut_color = '#000000'
    mapping_d = {'A': neut_color, 'R': pos_color, 'N': neut_color, 'D':
        neg_color, 'C': neut_color, 'Q': neut_color, 'E': neg_color, 'G':
        neut_color, 'H': pos_color, 'I': neut_color, 'L': neut_color, 'K':
        pos_color, 'M': neut_color, 'F': neut_color, 'P': neut_color, 'S':
        neut_color, 'T': neut_color, 'W': neut_color, 'Y': neut_color, 'V':
        neut_color}
    return None, mapping_d, None
