The first perk in the archer tree, overdraw? I think is probably the case. My game did this too when my archery was around 70, it probably wants you to buy the overdraw 3/5 perk you get at lvl 60. My game showed Archery as red and the archery skill level as 20 until I bought the perk then it went back to showing, "Archery 74" or whatever in white letters.