Help. I’m so stuck on what to do!!

So for my daughters nursery, I’ve been digging the whole “zen” vibe. Wanna make it really relaxing and chill. So far, this is what I’ve got her along with a big standing plant. The pictures I’ve attached are what I’ve ordered and the dresser is basically what hers is going to look like with that same type of set up along with her white crib. My question is, what the HELL do I paint the walls? I was thinking I super light grey but I’m so unsure?! Help!