>>> from colors import color

>>> lR = [(3, 5, 0.1), (5, 5, 0.3), (5, 4, 0.3), (5, 6, 0.2), (5, 7, 0.7)]
>>> lG = [(3, 5, 0.2), (4, 5, 0.4), (7, 5, 0.4), (5, 6, 0.6), (5, 7, 0.6)]
>>> lB = [(3, 5, 0.4), (4, 5, 0.3), (6, 5, 0.2), (5, 4, 0.9), (5, 7, 0.5)]
>>> d = color(lR, lG, lB)
>>> d == { (3, 5): [0.1, 0.2, 0.4], (5, 5): [0.3, 0, 0],
...        (5, 4): [0.3, 0, 0.9],   (5, 6): [0.2, 0.6, 0],
...        (5, 7): [0.7, 0.6, 0.5], (4, 5): [0, 0.4, 0.3],
...        (7, 5): [0, 0.4, 0],     (6, 5): [0, 0, 0.2] }
True