But I don’t want to choose my emojis based on the colour of my skin, I’d prefer to use something “neutral”, and while yellow as you said is not really neutral, it’s the closest thing we have to a neutral colour from all available options. I also don’t think unicode requires that the unmodified emoji be rendered as being yellow (correct me if I’m mistaken), and it’s probably apple and google who just decided that their fonts should render them as being yellow. I imagine one could with another font make them be magenta or some other color.