Colors can be tricky. I have had a few that showed phasing over time, or slight color changes, but nothing that affected performance whatsoever. With every ball being it's own identity (color-wise) I'm not surprised when things change a bit.
These are ever evolving coverstocks (usually using new polymers and new formulations) that take time to discover how colors are affected by wear, climate, lane surfaces, varying types of oil and volumes... The list of possibilities is long.
As well as Brunswick stands behind their product, any mishaps would be unforeseen, and if they affect performance I'm certain the issue will be resolved through proper channels.