Upgraded to Home Assistant 2021.7.3. History Graph Card color changed. How to change color back?

I just updated Home Assistant. After I did that my History Graph Card color changed. The History Graph Card used to use accent-color in my theme by default. Now, its changed to a seemingly random color with no way to change it back.

How do I change it back to using accent-color or at least explicitly specify the color? I can’t find any information on this anywhere. The only thing I can do is revert back to an older version of Home Assistant.

There’s a whole thread about this: 2021.7 History graph color changes

It’s apparently related to an update of a third-party package used in the front end, so some are describing this as more of a feature than a bug…

Thanks for the information!