Jet Pens - What's the Difference Between Black and Black?

So i'm on the jet pens web, si, and i'm looking at e'vean image roif these are what they look like. It took me a long time of looking at this image to see where there's any differences between the black. To my eyes, it's really hard to see that any of these black colours look any different from each other. So i titled this section things i'm loving. And they're great pens write the intpentel interge point. I can't express enough how good this pin is for what it is, for a jelling pen. The problem, the first problem i have with this, mikei thet six colors in this