I am trying to document a custom wiring harness in a British car. I would like to show the wires in the proper colors and the colors of the tracers. Is there a way to do this?
Kicad is geared towards circuit boards. There are probably better programs for this. I saw one mentioned recently. Hopefully someone will drop by and point you to it.
Welcome to the forum, though, I expect you won’t be here long. 
Hello and welcome @dporada
Not to my knowledge.
You can have different colored wires of different styles, but not, say, blue with a white trace (Bu/W)… for headlights, if I remember correctly.
Very good! Did you have a British car?
I may be. I may be developing some products that use PCBs for British cars.
Long ago. Positive earth Mini, negative earth Norton bike. In fact, most of the cars assembled locally (Australia) used the same color coding as Lucas some time ago.
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FYI - as mentioned, you can Change Colors and Wire/Line thickness.
Can also ‘Cheat’ and overlay multiple Wires (with different Colors and Line Style - can include small wire that connects them to have unified wire for a Net…). Example screenshot below…
You should look into drawings programs. I use CorelDraw but its $$$. I’m sure there is something free out there.
You can also look at Affinity designer. Not free but low cost.
For British cars it’s easy, just stay with black.
That’s the colour of the wiring harness when the smoke has been let out.
…
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I have Vectorworks. I can define line colors and patterns, but the patterns are different dashed line types. I may be able to overlay one line over another as BlackCoffee suggested.
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How about Fritzing ? that has colour options and it’s open source, at least it used to be ! and it’s geared towards point to point in it’s Breadboarding bit
Polonez! Old days! 
BTW. Looks like a very useful piece of software. Great job!
Just donwload if you have QET program…
Nice, thanks all
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