Red by name 'red'

Red by percentage 'rgb(100%, 0%, 0%)'

Red by decimal 'rgb(255, 0, 0)

Red by hexadecimal '#FF0000'

Red by Shorthand Hex Notation '#F00'

Note: In 'Shorthand Hex Notation', each digit is interperated as being repeated two times.

For Example
#FAB = #FFAABB
#BAD = #BBAADD