Hey there
@NellyitisIts Its actually hard to tell the colors in the pictures but I do see some slight discoloration. Its to difficult to tell with the current pictures, but from the current ones it looks like genetics and not a problem you caused. You PH is fine, but temperatures are a little high and humidity a little low. Other than that tho I wouldn't worry just yet, give the seedlings time to do there own things and they should be fine 😎