I left my rear sites as is. Still experimenting. Have fun.
I tried white and yellow on my EC9s. Settled on yellow and may try orange next. Some friends swear by orange. Any color for me is better than black. Getting older is a pain some days! My eyes pickup white better but will test just to find out.
*My Glock G44 came with white and I love the white on that rimfire.
*My LCPII22LR is about to get a white front site.