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.
Tag: color mode
Colour space
A colour space is based on a colour model, and is its concrete application to a colouring method (printer, monitor, etc). It therefore contains all colours that can actually be represented through this method and the associated materials.