1. METEOSAT SECOND GENERATION (MSG) INTRODUCTION TO RGB COLOURS
APPLICATIONS OF
METEOSAT SECOND GENERATION (MSG)
RGB IMAGES: PART 02
INTRODUCTION TO RGB COLOURS
Author: Jochen Kerkmann (EUMETSAT)

2. INTRODUCTION TO RGB COLOURS
PART 2:
INTRODUCTION TO RGB COLOURS

3. Definition of RGB Colours
Red, Green, Blue: The three colours of light which can be mixed to produce any other colour. Coloured images are often stored as a sequence of RGB triplets or as separate red, green and blue overlays though this is not the only possible colour representation*. These colours correspond to the three "guns" in a colour cathode ray tube and to the colour receptors in the human eye.
* Other commonly used colour representations are:
The CMYK colour model (Cyan Magenta Yellow and Key (black))
The HSV colour model (Hue Saturation Value)

4. The Colour Circle

5. RGB Colour Values
RGB colors are defined using a decimal or hexadecimal notation for the combination of Red, Green, and Blue color values (RGB). The lowest value that can be given to one light source is 0 (hex #00). The highest value is 255 (hex #FF).

6. More RGB Colour Values
Examples of colours (names) and 8-bit RGB values:
Red 255, 0, 0
Fuchsia 255, 0, 255
Skyblue 153, 206, 235

7. RGB Colour Names
A collection of color names are supported by Internet Browsers. Below, are some examples: