Colour mode

The colour mode is a setting that determines the depth to which colours can be displayed in an image file. This also affects the size of the file.
The most common colour modes are RGB, CMYK, Lab, Index mode, Greyscale and Bitmap.


RGB stands for red, green and blue. Human colour vision is based on these colours.


sRGB is the most widely used RGB colour space, and was created for monitors by Hewlett-Packard and Microsoft in 1996. sRGB is the standard colour space of all inexpensive digital cameras and scanners.

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