In commemoration of the tree that is central to nine worlds, extending to the heavens, spring and well, here are some questions that have been building, specially for One.
Why green colour?
Green is the most natural colour; and piquant in it eliciting petrification in us, sometimes when we encounter it. Trying to deal with the psychology.
Why black?
Sigh. Need to get back to that day, again. It was just when {all of a sudden} taking sight on the colour black, and after that wanting make a memoir of it. And food became the nucleus.
Why pink?
Pink is a shallow colour, just wanting to flirt with it.
Why not any other colour, like orange?
Nice to see, but not really nice to eat. It is just round-abouts, carbohydrates to sugar to some inconspicuous element of the food. Not really having a backbone, like sakura (pink); a strong ambassador for the colour. Probably haven't found it yet.
Why not blue colour?
There is no reason for no blue, just that no reason for blue.
How about red?
P.S. How about you getting your own red, or transparent, or white.