The Weird World in RGB
Technology Connections1 HN recommender · recommended in 1 month, 2020–2021
explainer · general · evergreen · 2020–2021 on HN
Technology Connections explains how RGB light and color work, from hue and saturation to color vision and how objects appear under different lighting. It uses a studio setup with colored lights to demonstrate the effects.
HN points to it as an accessible explanation of how color and reflected light behave, especially under LED lighting.
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3 comments from Hacker News
This works for direct illumination (eg an LCD screen) but fails for reflected light (eg a light). This video from Technology Connections helps explain ▶ this video
Why would you do that I don't know, but for me personally the reason is that LEDs tend to strobe (sometimes noticeably to peripheral vision) and do not emit a smooth continuous spectrum—unlike incandescent bulbs, they produce a narrow, spiky spectrum[0] and objects in your room may look unnatural as they reflect it[1]; this may be especially bad with some RGB LEDs but fundamentally is a property of all LED lights because physics. [0] link [1] ▶ this video
Short answer: No. We (the majority anyway, as some are colourblind) only perceive lightness, reddish, greenish, and bluish. The brain uses the info and effectively synthesises the image in our brains. Long answer: Colour is a very rabbithole topic but Captain Disillusion has a summary of it ( link ) and Technology Connections has a discussion ( ▶ this video ).