crust pantsssssss and bleach problems

so right, i have this crstpants im still working on, iv had them over a year, myabe 2 soon? i have no concept on time. but shitty part that i for some reason cant get rid off is sun bleaching :/ like most of my patches that were black r turning beige like bruh, just let my pants be black. now weird part is that its mostly the base patches that get bleached, the ones with logos and signs somewhat keep most of their original color (keep in mind that all my patches r handmade by me with cheap ass fabric from an old shirt soooo uhh yeah) i wanna get it fixed ngl but nothng i do works, i cant rlly dye it ether cuz that means il have to put them in the washing machine, which will absolutely fuck em up (with the fabric dye that i have acces to) yikes