Colors

White isn't pure; White is blank.

Black isn't pure; It's just that heavily corrupted.

Red isn't pure; Wrath and Lust hide within. (And two sins are better than one?)

Blue isn't pure; It's empty and Sad.

Gray isn't pure; It's decayed, old and forgotten

Yellow isn't pure; It's fake and social

Pink isn't pure; It's the color of teenage promiscuity

And Green?
Moss and envy are as pure as you can get, dear...