Mid-century North American elasmobranch monographs documented shark jaws and tooth-replacement plates as cleaned, whitened specimens — serrated rows of bone-white teeth and fine dermal-denticle texture photographed against a dark slate study field. The register is forensic and strictly greyscale.

This design system distills that museum-specimen discipline: cool slate grounds, ivory dentition tones, hairline rule frames, plate numbers, and millimeter scale bars. The only "color" is the contrast between bone-white teeth and the cold study slate behind them.