i mean it kinda says the key to it in settings "Theming best practices: Make sure your theme is easily readable and accessible Make sure your theme follows a coherent color scheme Make sure your theme isn't too bright or too dark, as many users could be sensitive to extreme colors" but also if youre having trouble with a color scheme you can look up color palettes and if you want your theme to be even cooler Try some css (for example i have a font on my profile and my pfp floats, just if you figure out how to use a font i beg of you Do not choose one that people cant read ..... ive seen some pretty rough looking fonts)