What do the color of the crests mean behind your Superstar KO Level?

(see attached images) What does the color of the crests mean behind your Superstar KO Level? This is on Madden 20 and as you can see the level 41 crest is a navy blue color and the level 26 crest is a green color. However, to make matters more curious I have seen a level 7 be green and a level 28 be pink and a level 50 be black. What do the different colors represent, EA Support cannot tell me and they advise me to ask in the forums. Does anyone have a table that explains what the colors mean.. if anything? I thought originally level 1-10 would be green and then it would change between 11-15 etc. but that's obviously not the case since i have seen a level 1 and a level 28 have the same colored crest.

thanks in advance, hopefully someone can get my curiosity fulfilled!