I am doing a wedding painting. It's of the bride's flowers in a vase. The groom likes black lights and has since I went to college with him. He put these can lights around the reception hall that made black light spotlights up along the wall. It is in the photo that I'm painting. It's a bright purple. I can get all the colors around the light, but right where the light is the most intense, I just can not get that color. The best combo so far has been alizarin crimson with ultramarine blue. All my other blues are too "green". All my other reds are too "orange". It might be good to tone down the intensity of the color back there anyway since it is taking the focus away from the flowers. But what a cool way to have both personalities in the painting. Any ideas?