Color and Background-Color

They can accept a keyword, HEX, RGB, and HSL values.

p {
  /* keyword example: */
  background-color: blue;
  /* hex example: */
  background-color: #1100ff;
  /* rgb example: */
  color: rgb(100, 0, 127);
  /* hsl example: */
  color: hsl(15, 82%, 56%);
}