[lemma=white] [□=□] □ □
[lemma=white] [lemma=□] □ □
[lemma=white] [word=□] □ □
Given this assumption , it 's simple to compute XYZ coordinates for the monitor 's white , red , green , and blue from their chromaticity values . Varieties are available with different pod colors ( white , red , green , and purple ) and lengths .