Close critics who are not artists are your often best friends, and your worst enemies. I wish he would just say WHAT he doesn't like about the painting, which would be helpful (and not hurt my feelings) instead of commenting on one color. But he's usually right when a painting is off, even if there is no purple in it at all.
Anyway, the painting. This morning I am up again, looking at it, evaluating. It's not purple. It's just not right. The colors are not interesting from far away, there's not enough white space to suit me, but mainly i think, the design is not good. This is an experimental painting - a new size, a new technique, a new subject; so I'm ok with that, i just want to learn from it. Too bad i did it on large scale!
Purple? This morning finds me scraping off paint. The painting is not purple, but it's not good, and I am pretty sure it's the composition. That is not going to improve on it's own; so I've decided a redo is in order. Better to just get all that paint off now, before it dries or worse, I try to work on it more and "rescue it".
A tube of titanium white, done. Back to the store. A some more thinking time. Better composition. Less purple.