Three. A single hot-orange spark cutting through near-total darkness, with every surface stripped of color until the moment something matters.

ThreeTools is a matte-black developer canvas lit by a single molten-orange spark. The interface is overwhelmingly achromatic — near-black surfaces, white text, gray hairline borders — and the only chromatic element is a vivid #ff4300 reserved exclusively for primary action surfaces and decorative emphasis. Typography is aggressively bold: the system font is set at weight 700 across every size from 9px badges to 68px display headlines, with tight negative tracking that intensifies as type grows. Components are softly rounded with 15–25px radii on controls and cards, 50–999px on inputs and pills, giving a friendly counterweight to the otherwise austere dark background. The design system is minimal, monochromatic, and lets the brand-orange carry 100% of the chromatic narrative — a single warm point in a sea of graphite.