What do you say when someone says that your shirt is a beautiful color? Do I say, "Thank you?" It's not exactly a complement. They're just expressing their opinion on a color...
I usually respond with either "Thanks" or "I like it too."
It's just a "stroke exchange" thing.
I always say "Thank you" or "I got it because the color reminded me of ....." a flower or the ocean or whatever the color reminded me of.