I didn't know they had a new resistance code, mind you I have been retired for 12 years. There are ways and means of getting round the problem.
Initially I had trouble with rubber flex because the red and green looked exactly the same to me, OK if you were changing something with one end still connected but when fitting a new flex as we often did, I had to go into the shop and ask someone what colour wire I was holding then grasp it tightly until I got back into the workshop.
Resistors weren't to bad except things like 1 meg and 1k or 100 ohms, last band looked the same colour. I have a rack of drawers in my workshop with two divisions in each and a dymo tape label on the front, which worked fine providing I put them in the right drawer.
Colour TV did initially cause a problem, I could set the grey OK with blue and green but the red was a problem, I would deliver a set and shortly thereafter receive a phone call saying that everyone's faces were green, so I would adjust the red in front of the customer until they were happy, but I found an answer to that.
If when setting them up on the bench I turned the red up until I could see it, then turned it down until I just couldn't, that was fine, never had another problem.
I don't even have a problem with traffic lights now because although the red and amber look the same, with the modern LED lights the green looks blue, very bright blue sometimes, its only the old ones with bulbs in that look a bit green - when I am close enough.