Great Blue ink!
Diamine Royal Blue is an excellent blue ink that does not lean toward purple or green, but is solidly blue. It goes on nice and wet and is well lubricated, which gives a good writing experience. It is a nice deep blue color when it first goes on the page and then it dries to a lighter blue. This is lighter in color than Noodler's Blue. It easily washes off the pen with water and does not leave a residue. An excellent somewhat lighter blue ink!