Well that’s a good thing! I’m a firm believer in letting kids choose their own bedroom colors after all, it THEIR room. However, if the color keeps you up at night, you should find a happy compromise.
Here is a bright one from Benjamin Moore. If your child likes it but you find it to be a little bit too much all you have to do is compromise. Yes they can have this color but how about using it as a ceiling color? Too much for the ceiling? Use it on their door with a wide horizontal stripe all around the room.
There! They are happy because the have picked a color for their room and yet it would be too much color for one space. Great color compromise don’t you think?