wild indigo

NOUN /waɪld_'ɪndə,ɡoʊ/
11 LETTERS · 3 SYLLABLES · STARTS WITH W

wild indigo is a valid 11-letter word worth 16 points in Scrabble and 19 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS
W4I1L1D2I1N1D2I1G2O1
4 + 1 + 1 + 2 + 0 + 1 + 1 + 2 + 1 + 2 + 1 =16 PTS
DOUBLE WORD → 32TRIPLE WORD → 48
MEANING

What does wild indigo mean?