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> Tools like APCA improve contrast modeling, but they still don’t account for halation, ambient light mismatch, or eye strain. Doesn't APCA advocate a maximum
by seanwilson 1y ago
> Tools like APCA improve contrast modeling, but they still don’t account for halation, ambient light mismatch, or eye strain.
Doesn't APCA advocate a maximum contrast? Best link I could find right now is https://github.com/Myndex/SAPC-APCA/discussions/106 https://github.com/Myndex/SAPC-APCA/discussions/106 but it lacks explanation. If it doesn't account for the above, any ideas what APCA means by maximum contrast then and why the above was overlooked?
- vedmakk 1y agoMy understanding is this: - APCA does define a “maximum contrast” (currently set at Lc −90 for dark-mode text) to prevent extremes that actually hurt readability. - But that limit exists purely to guard accessibility - i.e. ensure text remains legible - not to model all factors of visual comfort. APCA’s core goal is “readability contrast” not halation, ambient-light mismatch, or eye-fatigue. So yes: what’s accessible (legible) often overlaps what’s comfortable, but it doesn’t guarantee it. The "Color Comfort Score" aims to pick up where APCA leaves off, by folding in those extra perceptual and environmental factors.