Brightness 继承自： Enum

Describes the contrast of a theme or color palette.

枚举值

名称	类型	默认值	说明
LIGHT	—	'light'	The color is light and will require a dark text color to achieve readable contrast. For example, the color might be bright white, requiring black text.
DARK	—	'dark'	The color is dark and will require a light text color to achieve readable contrast. For example, the color might be dark grey, requiring white text.