system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman] Which suit is more practical for Batman's stealth purposes? Blue and Grey or Black and Grey?

I've seen arguments made for both and personally I'm more a fan of his blue and grey look and hope to see it in a live action film someday.
gpt
Blue and grey would be better, unless the blue is a brighter shade. The darker shade allows you to better blend into darkness. Straight black could sometimes be "to dark" for the surrounding area and actually cause your silhouette to stand out.