I’m not agreeing or disagreeing with any of you as I don’t have enough knowledge on the topic, but what you say would effectively mean that there is no other possible color besides RGB, which is technically true, but is a nigh useless distinction as color blending is a real phenomenon that happens to human vision. In this way, subpixel hinting, while a hack with quite a few tradeoffs, just hijacks color blending used for producing color normally on your screen for sharper fonts.
> but what you say would effectively mean that there is no other possible color besides RGB
It would not at all mean that? I don't know why you would think it means that.
All I am saying is that a if you draw a vertical line 7 subpixels wide, the light it emits will not add up to white. This is a simple physical fact.
To make it easier to imagine, think of a one subpixel wide vertical line. It will be either pure red, pure green or pure blue depending on position. In no way will that ever look white.
