We don't wear Navy enough tbh though I think the current blues are the worst I can remember.The capri era
I think the early 2000s Whites and Oranges are fine. Have never had strong opinions on them either way. But I've always liked the Blues. The black and midnight navy was tough and fitting for the style of play those teams employed.
The current white jerseys with the cursive script are clean. Probably my favorite jerseys.
I think the fighting Illini on the front of the jersey works with the flying Illini throwbacks but in general the ones that just have Illinois on the front are better. They should 100% keep the white cursive script forever.