RGB colour values

About RGB colour values

• Colour values are the sets of numbers and/or characters used by colour models to systematically identify and store colour information in a form of colour notation recognisable to both computers and humans.
• Every colour within a colour model is assigned its own unique colour value.
• RGB colour values (codes) are represented by decimal triplets (base 10) or hexadecimal triplets (base 16).

RGB colour notation

• 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 hexadecimal 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.