Hex color code values are based on hexadecimal number system and are defined in values between 00 and FF. Hex color code start with hash symbol (#) and are followed by six hexadecimal numbers (0-9, A-F). For example, #FF0000 represents red color.
RGB color code values are based on decimal number system and are defined by integer values from 0 to 255. For example, rgb(255,0,0) represents red color.