I am looking for a ballpoint multipen refill that produces a bright blue line. I have a lot of different types already, but they are all a very similar color and it is not what I want. The typical blue ballpoint is very dark and shades strongly toward purple. I am looking for a brighter blue with a shade midway between purple and cyan.

No one seems to post color samples for ballpoints like they do with fountain pen ink. Can anyone help me find a blue refill with the color I want?