fin tints

Hi, I’m using the West System for glassing a longboard center fin and have heard stories about the glass turning yellow in the sun, I use to use it to fix my lonboard with and it hasn’t really yellowed very much or anything, maybe thats because the repairs are on the bottom. Either way, I was wondering that if I made the fin green, do y’all think it would discolor at all. I’m making the fin for a girl and wanted it to look good for a longtime. Anyways, this is a great site and all help is definitely appreciated. -Alex