Red Star Converse Low-Tops

Size 7M/9W red Converse All-Star Chuck Taylors with white stars. Wanted to love these, but as you can see in the picture, the right shoe sole has some yellowing that I can't seem to fix. I took pictures inside without a flash, inside with a flash, and outside in natural lighting, as that seemed to show the discoloration the best. Had I noticed when I first bought them on Poshmark in 2019, I wouldn't have bought them. They were advertised as new. Wore them once since I bought them, and then noticed the discoloration. They've been in my closet since.