[slapresta]

This is about icon fonts and font rendering and has nothing to do with Unicode. Code points don't have colour; there's no colour requirements anywhere in the spec.

Your fonts don't have to support the entirety of Unicode. That's why we have font stacks and fallbacks.

[Ruud-v-A]

U+1F499 BLUE HEART U+1F49A GREEN HEART U+1F49B YELLOW HEART U+1F49C PURPLE HEART U+1F53D DOWN-POINTING SMALL RED TRIANGLE U+1F536 LARGE ORANGE DIAMOND U+1F537 LARGE BLUE DIAMOND ...

[slapresta]

That doesn't directly translate to a color requirement in the font, though.

[anonymfus]

Except skin colours which are now modifiers.