In Safari 20.0, Tahoe, when you visit various sites and have a couple of tabs open, you get the standard light grey and white, but when you visit certain sites, it will change the open tabs to a particular colour, as shown in the two attached images.
(I have blocked out the sites with the red lines)
How do I stop it doing this? And just keep it as the old/standard look, light Grey/White all the time.
Thanks for any help.