All green clothes decolor in the front a lot and I don't want to replace them

Basically what the title says for some reason my clothes especially the green ones get yellower in the front and it's killing me.i don't want to replace them cause I love the fit. I don't stay In the sun that much for it to be such a drastic difference and if I stayed why would it be only on the front. What could have caused this.I don't want to replace clothes. I love green and this happens to a lot of my clothes. It's not even a cool vintage look imo since it's not the same everywhere but such a drastic change between front and back