Uber. Black-and-white transit kiosk.

Blue supporting accent for decorative details and low-frequency emphasis.

Headings, body text, top navigation bar, footer background, filled controls, sticky bottom bar, location pin icons — the achromatic anchor that gives the white canvas its structure

Secondary headings, footer column titles, darker body text variant — used when pure black feels too heavy on dense surfaces

Supporting neutral for secondary UI, dividers, and muted labels. Do not promote it to the primary CTA color

Body text on light surfaces where full black would feel aggressive, secondary paragraph copy

Input field borders, divider lines, placeholder-adjacent borders — the workhorse hairline color

Muted helper text, disabled-link text, secondary metadata in body copy — disappears by design

Suggestion card backgrounds, subtle section washes, input field fills, nav hover states — a single step off white that creates depth without contrast

Page background, card surfaces, text on dark bars, input fields — the dominant canvas that every other element sits on