Getting accurate colours with RGB numeric triplets

Vagulus

Newly Enlightened
Joined
Oct 12, 2017
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I am using a Common Anode RGB LED and the colours it displays are nothing like the colours supposedly related to RGB codes. It has been suggested that the codes to which I refer are related to television and not to LEDs as such, so my first question is, "Where to I find a table of RGB codes relevant to LEDs (more specifically, to this LED)?"

More generally, how do I get predictable colour from an RGB LED?

Thanks
 
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