Returned by readTokens: the tokens of one style in one scheme, read as the kind of value each is.
value(token: string): string
Returns the resolved value of token, or throws when it isn't set.
color(token: string,over?: string): string
Returns the color of token as #rrggbb. A translucent one is laid over
over (another token) first, as it shows on the site; without over it
stays rgba(), as a shadow's must.
stops(token: string): string[]
Returns the colors of the gradient token, in order, without positions.
font(token: string): string
Returns the font stack of token, single-quoted for a style attribute.
A family the site bundles as "X Variable" is named "X", as a mail client
or Google Fonts knows it.
px(token: string): number
Returns the length of token in pixels.