To pass the bridge, you must first face the mirror... (cheesy monologue about your past mistakes)
Even with morning effect the moon is still brighter. If it wasn't brighter than the surrounding sky it would be invisible (like the shadow side of the moon). But I understand you only had 2 colors to work with. You could do something like this, maybe, but I like the color balance in your version better.
I tried to replicate the morning moon effect, where the sky is bright but there is still a visible moon, happens a lot here where I live!
example (not my picture)
Very nice use of two colors. Great readability, although I don't know how I feel about a dark crescent moon.