Ami342, I started this with one of my dinghies, using a red/white for jib halyard running down port side of the mast, and green/white for main, down starboard side. Just like running lights, and that was my sole reason for the color choices. I carried this over to my bigger boat, but the covers for the Vectran cored line (I shouldn't have bothered to spend all the money for) were solid red and green. And then I put a brilliant yellow with black flecked line up for my spinnaker halyard, because, you know, there's yellow on the chute. I also got some custom made red/white/blue 5/16" New England Salasa for jib sheets, with the thought that I could get 3/8" to match - but then discovered I couldn't. The least obnoxious standard colored Salsa is the grey/white/yellow with colored flecks, so I settled for that on the main sheet.
Now I look at the boat, and I find it to be rather garish. If I had it do over again, (in what, 10 years when the halyards are worn out again?) I'd use Selden's standards: Jib halyard, blue; Main halyard, white; Spinnaker halyard, red. And then for sheets, I'd still use New England Salsa grey, for both jib and main sheets. It's such a nice line.
My control lines are whatever colors, I think blue/white/orange fleck for outhaul, green/white/orange fleck for reefing line because these are the colors of VPC line. I had a piece of whatever for the main downhaul/cunningham. And then my topping lift wound up being white/red flecks and jib downhaul line was standard white/green/red flecks as per New England Sta-set.
But really, I kinda would rather tone down the riot going aloft on my boat
