If you see one you like, you can use it by going to your profile and setting topcolor to the hex code.

Also, I found an easter egg. If you go to https://news.ycombinator.com/posts?id=nickb then you can see both comments and submissions for that user on the same page.

EDIT: Submitting this caused HN to grind to a halt. I'll claim my "I broke HN" merit badge.

I wonder, does this aggregate exclude topcolors that have only 1 user? Mine's a rather specific, handpicked-in-a-color-picker value of blue towards the bottom, and while I don't doubt that someone else could've picked it, there's of course 16.7 million of these things, so it's not terribly likely. It'd be interesting to throw out completely unique colors and see what we're left with, or to see them on a histogram.

I immediately checked to see where my top bar color was, since I've had it for several years. It's a kinda nice hex number, but one which I did hand-pick for it's color properties, so I doubt that anyone else has chosen this color. It's approx. #600 down the list, meaning that it and the 300 colors below it are used uniquely (at-least).

Previously: https://news.ycombinator.com/item?id=7432201

How do you change the topbar color?

From your profile page. There's a karma threshold (250, I believe) before this feature is enabled.

Ah I see.

44bbdd is really the nicest one ;)