But there's no more colors of the rainbow to test.
BAH! Back to work.............
I was getting different fp colors with different shade colors. Blue gave me gray but red gave me yellow orange. If the text is under the shade it can be altered a bit. Just an idea that taking the shade and tweaking it may get a closer color to what you want...unless the text is over the shade.
If I mistook you ignore post haste
The shade boxes helped me a few times. playing with opacity and colors yielded varying results. Sometimes good.