256 RGB Colours – Red to Yellow
256 RGB Colours - Red to Yellow
TRY SOME QUICK QUESTIONS AND ANSWERS TO GET STARTED
About the diagram
This is one of a series of six diagrams that together show all 1530 fully saturated colours in the RGB colour model.
Each diagram shows 256 colours starting with a primary and finishing with a secondary colour or visa-versa:
- Red (primary colour) to yellow (secondary colour)
- Yellow (secondary) to green (primary)
- Green (primary) to cyan (secondary)
- Cyan (secondary) to blue (primary)
- Blue (primary) to magenta (secondary)
- Magenta (secondary) to red (primary)
Understanding the diagram
- All the colours in this diagram have been produced by mixing different proportion of red and green light. The third primary colour, blue, is always off.
- The diagram shows a stripe of red (primary colour) at the top, so, red has been turned to maximum and green to minimum intensity.
- The stripe of yellow at the bottom results from both red and green being set to maximum intensity to produce the secondary colour.
- The block of colour swatches between the stripes are made up of 16 rows and 16 columns.
- The first swatch at top left matches the red stripe: red = 255, 00, 00.
- The last swatch at bottom right matches the yellow stripe: yellow = 255, 255, 00.
- To make sense of this, it helps to understand how RGB colour notation works:
- When mixing any RGB colour, three numbers (separated by commas) show how much red, green and blue light is to be used.
- The minimum value for each light source is 0. In this case the light is fully off.
- The maximum value for each light source is 255. In this case the light source is fully on.
- As each number increases so does the intensity of the corresponding light but the wavelength, and so the colour we see, stays the same.
|RGB colour values
|Maximum value for each light source (fully on)||255||,||255||,||255|
|Values between 0 and 255||1 to 254||1 to 254||1 to 254|
|Minimum value for each light source (fully off)||0||,||0||,||0|
RGB colour values
Now let’s look at RGB colour values in detail
RGB colour values are represented by decimal triplets (base 10) or hexadecimal triplets (base 16). These triplets are used in software and apps to select a colour.
- In decimal notation, an RGB triplet is used to represent the values of red, then green, then blue.
- Decimal numbers between 0 and 255 are selected for each value:
- Red = 255, 00, 00
- Yellow = 255, 255, 00
- 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.
- Hexadecimal numbers between 00 and FF are 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 are: 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 are: 10,11,12,13,14,15,16,17,18,19,1A,1B,1C,1D,1E and 1F.
Some key terms
Diagrams are free to download
Downloads: Slides or Illustrations
- SLIDES are optimized for viewing on-screen.
- ILLUSTRATIONS are optimized for printing on A4 pages in portrait format.
- Slides are available in JPG and AI (Adobe Illustrator) file formats.
- Titles: Slides have titles.
- Backgrounds: Black.
- Size: 1686 x 1124 pixels (3:2 aspect ratio).
- Illustrations are available in JPG and AI two file formats.
- Titles: No titles.
- Backgrounds: White.
- Size: 1686 x 1124 (3:2 aspect ratio). So all illustrations reproduce at the same scale when inserted into Word documents etc.
- Labels: Calibri 24pt Italic.
File formats: JPG & AI
DOWNLOAD THE DIAGRAM ON THIS PAGE AS A JPG FILE
- JPG (JPEG) diagrams are 1686 x 1124 pixels (3:2 aspect ratio).
- If a JPG diagram doesn’t fit your needs, you can download it as an AI (Adobe Illustrator) file and edit it yourself.
- JPG files can be placed or pasted directly into MS Office documents.
DOWNLOAD THE DIAGRAM ON THIS PAGE AS AN AI file
- All AI (Adobe Illustrator) diagrams are 1686 x 1124 pixels (3:2 aspect ratio).
- All our diagrams are created in Adobe Illustrator as vector drawings.
- Save as or export AI files to other formats including PDF (.pdf), PNG (.png), JPG (.jpeg) and SVG(.svg) etc.
Spelling: UK & US
We use English (UK) spelling by default here at lightcolourvision.org.
COPY & PASTING TEXT
- After copy/pasting text please do a spell-check to change our spelling to match your own document.
- Download AI versions of diagrams to change the spelling or language used for titles, labels etc.
- We are adding American English (US) versions of diagrams on request. Just contact us and let us know what you need.
- When downloading JPG versions of diagrams, look out for JPG (UK) or JPG (US) in the download dialogue box.
Light, Colour, Vision & How To See More (https://lightcolourvision.org) : Copyright © 2015-2022 : MediaStudies Trust.
Unless stated otherwise the author of all images and written content on lightcolourvision.org is Ric Mann.
ALL RIGHTS RESERVED
No part of this website may be copied, displayed, extracted, reproduced, utilised, stored in a retrieval system or transmitted in any form or by any means, electronic, mechanical or otherwise including but not limited to photocopying, recording, or scanning without the prior written permission of MediaStudies Trust.
Exceptions to the above statement are made for personal, educational and non-profit purposes:
Before downloading, cutting and pasting or reproducing any information, images or other assets found on lightcolourvision.org we ask you to agree to the following terms:
- All information, images and other assets displayed and made available for download on the lightcolourvision.org website are copyright. This means there are limitations on how they can be used.
- All information, images and other assets displayed or made available for download are solely and exclusively to be used for personal, educational and non-profit purposes.
- When you find the resources you need, then part of the download process involves you (the user) ticking a box to let us (at lightcolourvision.org) know we both agree on how the material can be used.
- Please contact email@example.com before considering any use not covered by the terms of the agreement above.
The copyright to all information, images and all other assets (unless otherwise stated) belongs to:
The Trustees. MediaStudies Trust
111 Lynbrooke Avenue
We love feedback
We welcome your feedback 🙂