27 C.F.R. § 5.52
(b) Separate and apart. Subject to the exceptions below, mandatory information on labels, except brand names, must be separate and apart from any additional information.
(c) Contrasting background. Mandatory information must appear in a color that contrasts with the background on which it appears, except that if the net contents are blown into a glass container, they need not be contrasting. The color of the container and of the distilled spirits must be taken into account if the label is transparent or if mandatory label information is etched, engraved, sandblasted, or otherwise carved into the surface of the container or is branded, stenciled, painted, printed, or otherwise directly applied on to the surface of the container. Examples of acceptable contrasts are: