Is the colour on the players' score new? If there's anything about it send me the link ^^'

What colour?

Go to the players tab and you'll see red, orange, green, depending on the NG.

It is indeed new
Aesthetics

I noticed that a week ago, I think there are colours that differentiate between players who are making progress and those who aren't, but there are other colours too that I haven't been able to match up with the others.