Back to Black
It’s widely believed that the color “black” is associated with a negative connotation. Black is darkness. Darkness is bad. Darkness is evil. Black is an omen of malady or death. Black is a sign of sadness.
White is commonly seen as holy or innocent, a symbol of the good.
Black, in regards to light, absorbs everything in the spectrum. It is the complete absence of color, as the absence of reflective wavelengths makes color void. So, wouldn’t the color that is truly the brightest, the most pure, be that which takes in every ounce of light?
Black, in actual terms of color, is a perfect blend of pigment. So, if we’re associating happiness with yellow, anger or lust with red, peace with green, blue with sadness, etc etc, all of those together create that which combines everything else…black.
Juxtaposition to that, white is a combination of all (or nearly all) light spectrums being reflected. White essentially deflects your emotions, if we’re going with metaphorical color association, of course).
Just rambling. Some of this science is probs wrong, so feel free to discuss.