The recent changes to the icons for tags in the side panel (not in the main task area which are fine) are definitely a step backwards. I use tags extensively and have many starred and showing in the side panel along with projects. I work in dark mode.
The tag icons have the tag color as the background and a very thin border of the same color just slightly brighter. It is very hard scan the tags easily with the current design. Prior to the change it was simple and obvious. I tried switching to the light theme and it really does nothing to improve the situation.
Please consider reverting back to the way it was or doing something to improve how it appears currently. Just don’t leave it the way it is. It’s definitely not up to Asana’s normally well done UI standards. I makes me wonder if anyone thought to test these changes in the sidebar.