I just added a new resource that might be of interest for those who like using the markers/art pens. I've added a .zip file to my deviantart account (http://bolsterstone.deviantart.com/a...RAGE-101754155)
It includes swatches containing the approximate reds, oranges, blue, greens, etc., organized under the TRIA Letraset system, as well as a full-set of said colours. Plus I included a swatch using an approximation of the old system for TRIA/Letraset markers when their colours were organized under Pantone.
Hope these come in handy.