Great find, and a great image, Neil 
Of course, the best colour work is still done by combining three [or more] monochrome exposures.
Wonderfu as multi-layer film, and Beyer matrixed chips might be … they inevitably 'take the edge off'
MichaelG.
.
P.S. For more jolly photo fun … Have a look for Edwin Land's experiments with two clours.