object.style.scrollbarColor = "value";
<'scrollbar-color'> = auto | dark | light | <color>{2}
auto
Automatically specified by the user agent.
dark
Show a dark scrollbar, which can be either a dark variant of scrollbar provided by the platform, or a custom scrollbar with dark colors.
light
Show a light scrollbar, which can be either a light variant of scrollbar provided by the platform, or a custom scrollbar with light colors.
<color>
Specifies the color using a keyword or a numerical specification.