Emoji symbols aren't colored when text fill color is black

fill(0, 255)

  • Emoji color is black ?

fill(255, 255)

  • Emoji color is default ?

You mean “emoji aren’t coloured when the text fill color is white”? Tint is a multiplicatory operation, so tinting white has no effect, as you’re just multiplying by 1. Find the forum thread for making a sprite flash white for a number of approaches to making a sprite appear solid white. They could be adapted to do the same with emoji