> For example keywords are almost universally somewhere in the red blue area, never green.
This isn’t true. Blue’s probably most common these days, but black, orange, brown, yellow, green… they’re all pretty common, probably similarly common to red. In Pygments, the default theme even uses bold green for keywords.
> For comments it's the opposite, most often greenish or grey.
OK, this one’s more true. Other colours are sometimes used, but greens and greys are far and away the most common.
This isn’t true. Blue’s probably most common these days, but black, orange, brown, yellow, green… they’re all pretty common, probably similarly common to red. In Pygments, the default theme even uses bold green for keywords.
> For comments it's the opposite, most often greenish or grey.
OK, this one’s more true. Other colours are sometimes used, but greens and greys are far and away the most common.