DN, blue-purple, purple, indigo purple are the most difficult colour to shoot.
especially when there are blue-red spotlights. Colour tempature couldn't read the colour correctly since it between highly cold and warm colour. As you already know that we cannot shoot with flash so we depending on colour tempature as to get right garmen, skin, make-up and others in the right colour. It's really tough.
Designers wants their works to be presented exactly as they designed but then it's not easy for photographers when those lighting techinician tend to kill photographers with those mixing blue-red or purple colours. :D