def TFTColor(aR, aG, aB):
    '''Create a 16 bit rgb value from the given R,G,B from 0-255.
       This assumes rgb 565 layout and will be incorrect for bgr.'''
    return ((aR & 0xF8) << 8) | ((aG & 0xFC) << 3) | (aB >> 3)

BLACK = 0
RED = TFTColor(0xFF, 0x00, 0x00)
MAROON = TFTColor(0x80, 0x00, 0x00)
GREEN = TFTColor(0x00, 0xFF, 0x00)
FOREST = TFTColor(0x00, 0x80, 0x80)
BLUE = TFTColor(0x00, 0x00, 0xFF)
NAVY = TFTColor(0x00, 0x00, 0x80)
CYAN = TFTColor(0x00, 0xFF, 0xFF)
YELLOW = TFTColor(0xFF, 0xFF, 0x00)
PURPLE = TFTColor(0xFF, 0x00, 0xFF)
WHITE = TFTColor(0xFF, 0xFF, 0xFF)
GRAY = TFTColor(0x80, 0x80, 0x80)