I love it, because it is not only more beautiful to look at a colorful screen, but because it makes me find my tab extra easily.
When you PIN your tabs, they lose the original colors you used, but they are still colorful. the non-pinned tabs, show the colors only after you click on them.
However, I believe that this is due to the latest upgrade (Or not so upgrade - because I haven't examined it yet), and not by fault of the designer, whom I think will overcome this issue sooner than we think.

THANKS BIG TIME