Diamine's Oxblood (one of my favorite reds) is approximately the color of dried blood. Red Dragon, by comparison, is brighter -- more the color of the liquid fresh from the vein. There's still a bit of brown to it, though. The difference between the two is subtle in thinner lines, but notable when the line is thicker, smeared, or when a shape is colored in. Impeccable behavior, as I've come to expect from this brand, across a range of pens and paper qualities. Not a lot of shading potential that I found, but I prefer my reds to stay solid, so that's hardly a fault. Highly recommended.