It's too easy to say that orange is happy and black is sad. To me, black is perfect. You can fill it with the emotion you want to express.
Sentiment: POSITIVE
My label, my genre, my everything is happy sad - I do a smiley face with eyes on both sides. So basically to me, it's totally okay to be happy and sad at the same time, it's totally okay just to be sad, it's totally okay to be happy.