Currently there is no proper way to set a global css color scheme on the fluent UI root, this makes it difficult to apply a CSS colors scheme to drop downs which will have browser scrollbars that will not be themed. The fluent theme passed to the root App component could have a color scheme field that's applied to the root or passing through classes from the App component.
Example (chrome)

Maybe I'm just missing something but I don't see an easy way to do this.
Currently there is no proper way to set a global css color scheme on the fluent UI root, this makes it difficult to apply a CSS colors scheme to drop downs which will have browser scrollbars that will not be themed. The fluent theme passed to the root App component could have a color scheme field that's applied to the root or passing through classes from the App component.
Example (chrome)

Maybe I'm just missing something but I don't see an easy way to do this.