RGB colour values are expressed as decimal triplets or hexadecimal triplets and are used in software applications to select specific colours.
A decimal triplet has three numbers between 0 and 255 divided by commas. A hexadecimal triplet starts with a # sign followed by three two-digit numbers with values between 0 and FF written without spaces between.
- RGB colour values (codes) are represented by decimal triplets (base 10) or hexadecimal triplets (base 16).
- In decimal notation, an RGB triplet is used to represent the values of red, then green, then blue. A range of decimal numbers from 0 to 255 can be selected for each value.
- Red = 255, 00, 00
- Yellow = 255, 255, 0
- Green = 00, 255, 00
- Cyan = 00, 255, 255
- Blue = 00, 00, 255
- Magenta = 255, 00, 255
- In hexadecimal notation an RGB triplet is used to represent the value of red, then green, then blue. A range of hexadecimal numbers from 00 to FF can be selected for each value.
- The hash symbol (#) is used to indicate hex notation.
- Red = #FF0000
- Yellow = #FFFF00
- Green = #00FF00
- Cyan = #00FFFF
- Blue = #0000FF
- Magenta = #FF00FF
- The sequence of hexadecimal values between 1 and 16 = 0,1,2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E and F.
- The sequence of hexadecimal values between 17 and 32 = 10,11,12,13,14,15,16,17,18,19,1A,1B,1C,1D,1E and 1F.