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Re:Design Without Color First by kazinator on Tuesday February 12, 2019 @07:22PM (#19149146)
What if traffic lights were designed this way?

They are; reason being: color-blind drivers are out there.

Traffic lights have consistencies which allow drivers not to rely on color. The consistencies aren't global, but hold within major geo-political regions.

For instance, where traffic lights are vertical, it's usually red on top, then yellow, then green. The order isn't perturbed. Moreover, the red light may be larger and brighter.

Re:Design Without Color First by mrxd on Tuesday February 12, 2019 @07:38PM (#19149240)
Yes thank you, I'm aware of how traffic lights work. They don't rely exclusively on color—clearly a different design philosophy from the advice of this article, which is to not use color at all for functional purposes.