scrollbarColor

This feature is not Baseline because it does not work in some of the most widely-used browsers.

Syntax: auto | <color>{2}

Initial value: auto

| Chrome  | Firefox | Safari |  Edge   | IE  |
| :-----: | :-----: | :----: | :-----: | :-: |
|   121   |   64    |   No   |   121   | No  |