Change color position on card frame

Recently I did a three color hybrid card and wanted each of the colors on the frame on a very specific spot. I can choose reverse, but I can't choose to rotate the colors around the frame. I worked around it with Affinity Designer.

I assume MSE creates hybrid frames by fading/overlaying the different frames. Can someone give me directions to the file in the MSE data folder that does that so I can mess around with it a bit?