"Dis color" is likely a colloquial or shortened way of asking, "What color is this?" or "What is this color?". It's a grammatically informal phrasing, but the meaning is generally clear.
Therefore, the answer depends on what "this" refers to. If you're pointing at a shirt, the answer would be whatever color the shirt is (e.g., "This color is blue."). If you're referring to a paint sample, the answer would be the name of that paint color (e.g., "This color is 'Ocean Breeze'.").
Because the question lacks context, a definitive answer is impossible. To answer accurately, one would need to see or otherwise know what the person is referencing when they say "dis."
