No... I said God designated certain colors and was very particular about that. Black is negative because of a culture we are raised in that viewed black as negative or less than other colors.
Sam.... what does Satan's horn represent to you? I imagine evil, because we put horns on things to depict an evil attribute, right? However, what if the horns were originally a positive thing? Well, they were. The Hebrew word for light ray (as you would imagine one coming down from the sun) is qeren (H7162). The light ray is in the shape of a horn, like a unicorn... and so the Hebrew word for horn is qeren. Satan was the angel of light... the horns were meant to depict that fact. Here is some neat proof.... ever seen
Michelangelo's sculpture of Moses? I linked it here.... please look at it...notice the horns.
Michelangelo wanted to depict Moses with his face shining like when he came off the mountain but with one color marble, that isn't possible. So he added horns... it was something of a pun.... but it gave him the ability to get that point across.
My point is simply that what we might see in a negative or positive light in our modern, Western, Greek influenced culture, may or more likely may not be in harmony with the culture messiah was raised in.