My husband loved the beautiful, vivid color of this rollerball pen - and blue is his favorite color, so there you go! I also purchased for him a set of blue refills for the future, and he couldn't be happier. He got many compliments at work from his colleagues, now that he has a 2nd Scriveiner rollerbal pen, in a different color :) Writing with them feels so good and comfortable (I have a few of my own). I am still waiting for a rainbow version!!!