I'm going to make some new audio cables for my home office/audio room. I'm transitioning from SE to balanced. Now found some fancy colored cables that I want to use and discovered the colors are used to indicate the length.
Does anyone use this system to build their cables?
I noticed that the "standard" is in feet and I want to build them in metric lengths.
Do I round off to the nearest 50cm? Like 5' = 1.5m, 10' = 3m, 15' = 4.5m ...
Or is this "standard" not widely used?
I like the idea and cable is not that expensive and the colors are available. So why not?
So if this is common practice with the "pros" I'd like to implement it too.
Related question: Do you label the cables to indicate the function? If so, what labels do you use?
Does anyone use this system to build their cables?
I noticed that the "standard" is in feet and I want to build them in metric lengths.

Do I round off to the nearest 50cm? Like 5' = 1.5m, 10' = 3m, 15' = 4.5m ...
Or is this "standard" not widely used?
I like the idea and cable is not that expensive and the colors are available. So why not?
So if this is common practice with the "pros" I'd like to implement it too.
Related question: Do you label the cables to indicate the function? If so, what labels do you use?