When I put in the codes for the members dashboard – mine does not have the tabs like the one in your video. The description tab colors are blue as well. Below is image of what I get when I put in code
If you added the custom CSS I provided to the customizer, then it should show properly on the front end of your website after you save the page in Elementor.
Of couse, if you are using a caching plugin you will have to flush it.