HTML color codes are hexadecimal triplets representing the colors red, green, and blue (#RRGGBB). For example, in the color Green, the color code is #00FF00, which is "0" red, "255" green, and "0" blue. These color codes can change the color of the background, text, and tables on a web page.
Below are common color names and codes. With these colors, you can also use the color name. For example, in HTML tags and CSS that use color codes, you could use "yellow" instead of "#FFFF00".