type TimingColor
Chrome's documented palette for a custom track entry.
Written out as a union so a call site is checked here, where there is no DevTools to check it. A host that does not understand the value ignores it.
packages/shared/src/timing.ts:32Type
'primary' | 'primary-light' | 'primary-dark' | 'secondary' | 'secondary-light' | 'secondary-dark' | 'tertiary' | 'tertiary-light' | 'tertiary-dark' | 'error'