I really didn't plan to come on here being an asshole, but he was being condescending in that post. Sorry for my part in it regardless.
I'm thankful for everyone trying to help, but the last two of you didn't understand what I was asking for and the answers are not relevant to my question. Like I said, I was only looking for the number colour on the icon specifically, as I play in 2D and text and shirt are perfectly fine to edit and I didn't have any trouble with those. Luckily others got my question and it was solved.
I actually took the trouble of downloading FM17 and FMRTE17 to show you what it was like before, in the hope that maybe this function will return in the future.