Changes

On the Plus, the values of the The R, G, and B subcomponents values on the Amstrad Plus have been converted adjusted to the new 12-bit palette using this a 4-bit scale: 

On a real an actual Amstrad CPC, the 50% signal has been is measured closer to be around 42%, not really 50%. This explains is why the Amstrad engineers chose #6 for the 50% colour component value instead of #7, to approximate better match the true real Amstrad CPC palette.