fix html tag color

[aldimhr]

opening and closing tags with different colors are confusing, here I tried to make them with the same color

[Luxed]

This isn't really an issue but a feature provided by the html syntax. Unfortunately I didn't find any option to turn it off.
Although, I do agree that blue might not be the best color to use here.
How about something like the following instead?

Also, this repository is still unmainted. Instead, I am currently maintaining it here: https://github.com/Luxed/ayu-vim