It was Citadel blues for each color, all the previous paint range. The white was a mix of P3 and Citadel (new range). I did use Nuln Oil to shade the corners.
That one spot was the only place it happened. To be honest, it's not the worst effect in the world. The purple under the white being next to the blue is kind of neat. I just didn't intend for it to be that way!