Yikes indeed! Certainly it would boil down to his particular level of severity but as a rule, people with color deficiencies have been encouraged to steer away from electrical occupations- particularly lineman work, for obvious reasons.
A mistake, in most cases would just be mismatched socks, his though could potentially be lethal. I have had a few patients over the years who adapted well, but in those cases they all depended on labeled wires. (A few now have depended on
Award-Winning EnChroma® Color Blind Glasseswith the labeling)
in the case of SA, (generally speaking) and others with color vision defects, they should still be capable of ascertaining the difference between
this particular open window and the adjoining
closed tinted windows. Why? Look at the images and you’ll notice the scattered glare that clearly bounces off the closed windows due to the refractive property of glass. (The speed of light changes which causes the scatter halos.) It’s a clue we all pick up on. ( If we are mindful and take even a second to observe our surroundings. You know prior to leaning out a high window....)
fun fact: up until modern history there was no word for the color blue. And there is a tribe in Africa that still doesn’t have a name for the color blue - and they cannot see it. - Not for pathological reason but simply cultural. The sky is simply the sky.