I change it all the time... atm i have this:
snag.gy/chaxQt.jpgGreen/off-white with the 4th piece set on the left. Dark background.
I change color depending on my mod.
But I prefer a color that blending away from the black and white color of the pieces.
IMO, I would like more colors to choose on the lichess site and even crave an editor were you can mix colors by yourself.