Go to app.guidemaker.com/settings or open the browser extension and click the User icon
Click on "Default Guide Tint" input to open the color picker
Input the hex code or use the color adjuster to set your color
Click off the tint picker or hit enter to save it.
Your default tint will automatically set the step counter, click target, and background gradient colors for all new guides.
You can individually override any guide's tint by adjusting it in the editor for that guide.