The original CPC video hardware supports a colour palette of 27 colours, generated from RGB colour space with each colour component assigned as either off, half on, or on (3 level RGB palette). The plus range extended the palette to 4096 colours, also generated from RGB with 4 bits each for red, green and blue (12-bit RGB).
The original CPC video hardware supports a colour palette of 27 colours generated from RGB colour space with each colour component assigned as either off half on or on (3 level RGB palette) The plus range extended the palette to 4096 colours also generated from RGB with 4 bits each for red green and blue (12-bit RGB)