As long as you are not giving it any nutrients yet, your color is fine. You'll see lots of weird genetic ticks the first couple weeks. They go away. Make sure your leaves stay dry and you are not overwatering and it will grow out of it on the next set of leaves.
Looks like you got everything right, no shame in being overprotective! Even if it seems small, post it here and the brotherhood of growers has your back. Happy grows and keep the journal going!! :)