1. If you go to a ship chandler that has some vegetable fiber rope (preferably hemp rope) you will see that the color of real rope (yellowish/orangeish) is a combination of approximately 15% raw umber and 85% yellow ochre. These colors are available in tubes at any art supply store in water, alkyd and oil bases. The water base works best. Variations in the rope colors can be achieved by putting in very minute amounts of warm colors (red, orange, tan, gray, white. etc). No greens or blues. There were no green or blue ropes in 1750. Ropes were never black or white (contemporary models usually have dirty brown colored rigging, but what do you expect after 300 years?). This black/white myth has been propagated for quite awhile, but it is totally wrong. Processed tree sap (heating the tree sap produced tar) was used as a preservative. Stockholm tar was the highest grade tar made then (and probably today). The best grades of tar had a light tan color. The bottom grade of tar had a dark brown color. You can buy wood sap tar over the internet today (amazon.com). It costs about 20 bucks per quart. I wouldn't waste money on a lot of high priced fake colors. Go to an art store and get the real thing. Almost every rope on a ship would have had a different color; origin of the rope fibers, aging, sunshine, salt, cooking waste (slush), etc would all have contributed to a rainbow of subtle colors.