How can the color of control characters be adjusted, like the unicode whitespace codepoints displayed in place of actual characters with draw_unicode_white_space set to punctuation (the default).
I have tried overrding the invisibles global and the punctuation rules in my .sublime-color-scheme but neither seem to apply to those codepoints, they just keep the foreground color with some opacity.
I want them to be more readable (particularly those in comments are hard to see) and maybe easier to distinguish, perhaps by adding some light tint or background.