So I was trying to adjust the RGB colors independently in Armory Create and found that you cant, the color is directly tied to the color set on the MOBO.

So here's the work around.

1. SYNC mobo to PSU.
2. Change PSU to desired color.
3. Unplug PSU from RGB header. "it remains with the assigned color"
4. Adjust MOBO to desired color.

Even after reboot settings stay with the PSU.