Which colour for the “waves”

[u/PinkPearlBeauty]

Click pics to expand!
For my sons wall I want to make blue waves going all the way across the wall. I’ve already sketched it out but I can’t pick between the 2 blue’s I have. I included a picture of some of the biggest blue staple pieces that will be in his room so base the best one off.

I feel like the darker one feels more neutral and clean especially since there already is a lot of different blue shades. But the lighter one feels more child like, ocean like but also looks a bit cheaper because of all the other blue’s already there. Or am I going crazy? Help me out please :)

Edit: forgot to say it will just be outlines, not fully colored in. Just going over the pencil outline with a thicker line!

[u/snail_juice_plz]

Out of your two options, I would say the darker blue.