The red color of the interface of the site is making eye tired, maybe change another color is much better.
Indeed the color it's to fiery for my eyes. I would like to see a friendly color for my eyes
You can change the color as you want, just try bitbaby's suggestion (I think this is the simple way to change the color of any sites)
Or try my suggestion just above it, you can learn your first javascript this way even if you've never coded before. It's really easy in a modern browser with the javascript consoles.