Seedlings tend to look a bit yellow once they break surface. Once they get a day or two of light, they will green up.
I wouldn't worry for now dude.I germed and started mine in soil but they looked pretty similar.. Water and progressive light and your good. Just to let you know I didn't give mine enough light at the start and they stretched real tall and lanky.. so I stacked it up with more soil and build a light box and I think they're going strong Good health keep us posted. Sent from my iPad using Grasscity