YouTube uses the colors white, red, and almost black for most of their brand assets such as their logo and also website elements such as icons, buttons and headers.
The hexadecimal color code for their red is #FF0000 while their almost black is #282828.
For the RGB of those same colors, they have (255, 0, 0) for their red, and (40, 40, 40) for their almost black.
In HSL, their red has a 0 hue, 100% saturation, and 50% lightness or (0, 100%, 50%) and for their almost black, 0 hue, 0% saturation, and 16% lightness or (0, 0%, 16%).
For their other brand color schemes, please continue reading below.