Dictionary tag: R

ROYGBV

ROYGBV are the initials for the sequence of colours that make up the visible spectrum: red, orange, yellow, green, blue, and violet.

  • The visible spectrum refers to the range of colours visible to the human eye.
  • White light, when passed through a prism, separates into a sequence of individual colours corresponding with ROYGBV which is the range of colours visible to the human eye.
  • White light separates into ROYGBV because different wavelengths of light bend at slightly different angles as they enter and exit the prism.
  • ROYGBV helps us remember the order of these spectral colours starting from the longest wavelength (red) to the shortest (violet).
  • A rainbow spans the continuous range of spectral colours that make up the visible spectrum.
  • The visible spectrum is the small band of wavelengths within the electromagnetic spectrum that corresponds with all the different colours we see in the world.
  • The fact that we see the distinct bands of colour in a rainbow is an artefact of human colour vision.

ROYGBV

ROYGBV are the initials for the sequence of colours that make up the visible spectrum: red, orange, yellow, green, blue, and violet.

  • The visible spectrum refers to the range of colours visible to the human eye.
  • White light, when passed through a prism, separates into a sequence of individual colours corresponding with ROYGBV which is the range of colours visible to the human eye.
  • White light separates into ROYGBV because different wavelengths of light bend at slightly different angles as they enter and exit the prism.
  • ROYGBV helps us remember the order of these spectral colours starting from the longest wavelength (red) to the shortest (violet).
  • ROYGBV are commonly associated with the colours of a rainbow.
  • A rainbow spans the continuous range of spectral colours that make up the visible spectrum.
  • The visible spectrum is the small band of wavelengths within the electromagnetic spectrum that corresponds with all the different colours we see in the world.
  • The fact that we see the distinct bands of colour in a rainbow is an artefact of human colour vision.
  • Some observers see a distinct cyan or indigo arc in rainbows producing the initials  ROYGCBV or ROYGBIV.
  • The perception of distinct bands of colour in a rainbow is attributed to the physics of light and the human eye’s sensitivity to different wavelengths of light.
Related diagrams

Each diagram below can be viewed on its own page with a full explanation.

References

RYB colour model

The RYB colour model deals with a subtractive method of colour mixing, commonly used in traditional art and painting where opaque pigments are in use.

  • The three primary colours in RYB are red, yellow, and blue.
  • By mixing these primaries in pairs and in the correct proportions, artists can create secondary colours like:
    • Orange (red and yellow),
    • Green (yellow and blue), and
    • Purple (blue and red).
  • Overlapping all three primaries creates darker and more complex hues.
  • While historically significant, the RYB model has been largely replaced by RGB and CMYK in modern digital design and printing due to the incompatibility of RYB with these technologies.
  • Many commercial and industrial paint shops have adopted computer-based systems that rely on tinting or colour-matching machines that can accurately reproduce wide ranges of specified paint colours that exactly match colour swatches or colours identified using RGB, CMYK, LAB or Pantone colour values.
Related diagrams

Each diagram below can be viewed on its own page with a full explanation.

References

RYB colour model

The RYB colour model is a subtractive method of colour mixing commonly used in traditional art and painting with opaque pigments.

  • The three primary colours in RYB are red, yellow, and blue.
  • By mixing these primaries in pairs and in the correct proportions, artists can create secondary colours like:
    • Orange (red and yellow),
    • Green (yellow and blue), and
    • Purple (blue and red).
  • Overlapping all three primaries creates darker and more complex hues.
  • While historically significant, the RYB model has been largely replaced by RGB and CMYK in modern digital design and printing due to the incompatibility of RYB with these technologies.