So now that safari 15 is the new browser for MacOs 12 Monterey is available for developers we noticed that something has changed in the toolbar. It now changes color depending in the website by default.
For example, the PayPal website turns your safari into an blue monstrosity.
You can simply turn that off in the advanced settings in safari to make it look normal again. Goto Safari -> preferences -> advanced -> Never use background colour in Toolbar