There's a lot of fountain pen ink out there, and a lot of resources on the Internet describing the various colors and what folks think about them. Here are the inks I've tried, and my opinions.
Other Pen pages:
The writing on the left of and the scribble was done with a fine nib, and the brand was written with a wider nib (except for the blue and burgundy). Samples were written on Clairfontaine Triomphe paper, mostly with Esterbrook J style fountain pens. The colors on my monitor are reasonably accurate, although I'd say that the Waterman purple is a bit more saturated, and slightly darker in real life. Obviously, what you see on your monitor may be different.