yellow-blue dichromacy

NOUN
22 LETTERS · STARTS WITH Y

yellow-blue dichromacy is a valid 22-letter word worth 41 points in Scrabble and 46 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
Y4E1L1L1O1W4-0B3L1U1E1D2I1C3H4R1O1M3A1C3Y4
4 + 1 + 1 + 1 + 1 + 4 + 0 + 3 + 1 + 1 + 1 + 0 + 2 + 1 + 3 + 4 + 1 + 1 + 3 + 1 + 3 + 4 =41 PTS
DOUBLE WORD → 82TRIPLE WORD → 123
MEANING

What does yellow-blue dichromacy mean?