@mister-moggysaid i find it hard to see to play better due to the very bright color scheme and the weird colors of the playing boards. i have to squint to look at the board.
here i am in the 700-800's but at lichess, which has a black field and colored board that are subdued i play in the high 1300's.
color scheme does make a difference to the old or with those with less than very good eyesight.
Have you tried this? ---> FAQ It is found in the FAQ and may solve your problem with colors. These brand options have been around for quite some time now. I have been using 'play the immortal game.' and find that it is easy on my eyes. 'Time for chess' is also good.