The ability to generate 16,777,216 colours (24-bit colour).
An image which uses 3 bytes to store colour information for each pixel. This allows 256 levels or red, green and blue, which together allow for 16.7 million colours. As the human eye is only capable of distinguishing approximately 18 million colours, this is called true colour.
A colour space (or picture) containing (up to) 8 bit = 2^8 = 256 different colours per channel. This adds up to 8+8+8 = 24-bit colour for RGB. (24 bit = 2^24 = 16.8 million different colours).
Describes the colour output on a monitor or printer. Requires at least 16 million colour nuances.