In ‘Account Settings’, head to the ‘Design’ tab. There, you’ll see the options below with our default settings — but you can use any HTML color code you like by changing the letter/number combination in the box next to the #.
Tip: a site like this one can help you pick a color on a chart and generate the associated code.
The ‘primary color’ defines the color of headlines in your newsletters and the color accents on your profile page. Here’s how a profile looks when it’s set to #E15718 (or as you and I like to call it: orange):
The ‘secondary color’ defines the colors of links to previous issues on your profile page, and also of links within your newsletters. This one’s set to blue: