useColor

Example
Theme: seekAnz
Theme: seekBusiness
Theme: jobsDbRebrand
Theme: jobsDb
Theme: jobStreet
Theme: jobStreetClassic
Theme: wireframe
Code:
const { background } = useColor()

return (
  <div
    style={{
      width: 50,
      height: 50,
      backgroundColor: background.brand
    }}
  />
)

Further References