There are 3 types how color can be displayed:

• Color Names — around 140 predefined names. Some names are assigned the same color, for example grey and gray represent the same color.
• RGB(a) — red, green, blue encoding (0-255). Total of 16.5 MIO colors acn be represented in this spectrum.
• HEX — same logic as RGB, but different encoding.
• HSL(a) —

/* Text Color */
color: white;

/* Background */
background-color: black;
background-image: url("url");

/* Colors */
color: black;
color: #333333;
color: rgb(0,0,0);
color: rgba(0,0,0, 1.0);