I use this stuff... A roll of half inch and quarter inch... 15 each..
It makes the multicolores of wires all become one color and holds them all together. Lots of times I put a zip tie each end and cut it off...
Of course I'm not using the factory bulkhead so I'm able to run my wires more hidden. Anywhere where they run next to White I used white and anywhere they run along the black parts I put it in black.... And of course I ran everything up and behind the fender lips and underneath the core support and places where you can't see it as much.. and there's quite a bit that's all tucked underneath the battery tray..