Yes, I've encountered a very similar situation.
(Like makeup appearing differently in certain lightings...)
A friend of my was saying,
"Stop it, you're making her blush"
Then I say, "It's just blush."
No response.
So I add, "It's makeup"
Her: "Yeah but, you're so red."
Something along those words.
Actually, people always assume that it's natural. Which is true (half & half)