What Causes Difficulty In Identifying Colors After Cataract Surgery?

I have had cataract surgery on both eyes several years ago. For at least a year when I look at something white it appears to be pink. This is true with everything that s white, and my eye doctor doesn t seem to worry about this. He said it is just my brain telling me white is pink. Have you ever heard of anything like this? Thanks. Sorry, last time I was on this site, I didn t have to pay for answers. Thank you anyway. YYYY@YYYY