We're live on Product Hunt!Support us
ColorArchive

A curated color library with 5,000+ algorithmically generated colors. Browse, search, save favorites, and export palette tokens — no account required.

CollectionsFamiliesNotesGuidesFree ResourcesConvertColorblindAboutSupportUpdates
Ready for static export
Privacy·Terms·Refunds·Cookies·Commerce Disclosure
colorarchive.org · © 2026 ColorArchive
Skip to content
ColorArchive
ProLog in
ArchiveAll ColorsCollections
Collection detail

Transit Authority

The palette of public transit: cerulean line colors, amber warnings, emergency red, and the cool grays of concrete and infrastructure. Designed for maximum legibility at distance and under varied lighting conditions.

Transit Authority draws from a century of public navigation design: the high saturation colors used by metro systems worldwide to ensure unambiguous line identification at a glance. These colors were not chosen for beauty but for maximum discrimination under fluorescent lighting, at distance, and in peripheral vision. As a design palette, they bring an authoritative, utility-forward energy to interface, wayfinding, and technical communication work.

NavigationSignageUI
Why this set works

High-contrast navigation colors drawn from the world's great metro systems — for signage, maps, and wayfinding design.

Wayfinding and signage design
Maps and navigation interfaces
Technical and utility-focused UI
Prompt words
transit map design in high-contrast metro line colorswayfinding system in municipal blue, amber, and redtechnical interface palette in high-saturation navigation colors
Export ready
1. Cerulean Core Vivid #20B7D5
2. Amber Core Vivid #D5B720
3. Ember Core Vivid #D55C20
4. Emerald Core Vivid #20D520
5. Cool Gray Core #737A82
6. Cool Gray Ink #222426
--transit-authority-1: #20B7D5;
--transit-authority-2: #D5B720;
--transit-authority-3: #D55C20;
--transit-authority-4: #20D520;
--transit-authority-5: #737A82;
--transit-authority-6: #222426;

3/3 free exports remaining today

Dark mode pairs
#20B7D5
#8FD7E5
#D5B720
#E5D78F
#D55C20
#E5AC8F
#20D520
#8FE58F
#737A82
#B7BABE
#222426
#E4E6E7

3/3 free exports remaining today

WCAG contrast audit

WCAG contrast ratios for all palette color pairs against white and black text.

#20B7D5
2.4:1 Fail
8.8:1 AAA
#D5B720
2:1 Fail
10.6:1 AAA
#D55C20
3.9:1 AA Large
5.4:1 AA
#20D520
2:1 Fail
10.6:1 AAA
#737A82
4.3:1 AA Large
4.8:1 AA
#222426
15.6:1 AAA
1.3:1 Fail

Color-on-color pairs:

+
1.2:1 Fail
+
1.6:1 Fail
+
1.2:1 Fail
+
1.8:1 Fail
+
2:1 Fail
+
1:1 Fail
+
2.2:1 Fail
+
2:1 Fail
+
1.1:1 Fail
+
2.2:1 Fail

3/3 free exports remaining today

Palette

Each swatch links back to its individual archive detail page.

Back to collections
1
Cerulean Core Vivid
#20B7D5
Blue · hsl(190, 74%, 48%)
2
Amber Core Vivid
#D5B720
Yellow · hsl(50, 74%, 48%)
3
Ember Core Vivid
#D55C20
Orange · hsl(20, 74%, 48%)
4
Emerald Core Vivid
#20D520
Green · hsl(120, 74%, 48%)
5
Cool Gray Core
#737A82
Blue · hsl(210, 6%, 48%)
6
Cool Gray Ink
#222426
Blue · hsl(210, 6%, 14%)
Editorial direction

Collections should do more than group swatches. Each one should read like a usable design direction with a clear emotional lane and a real application surface.

This detail route is the missing layer between a generic palette gallery and a convincing design reference. It gives the set a specific point of view.

Go further
Unlock Pro
Pro members get unlimited exports, advanced token formats, and priority access to new collections.
Learn about Pro
Take this palette further

Ready-made tokens for Transit Authority

Pro members can export these colors as Figma tokens, CSS variables, Tailwind config, and Procreate swatches — structured to drop directly into your project.

Upgrade to ProBrowse collections
Upgrade path

From collection to Pro

This collection proves the taste and color direction. Pro members get advanced token exports, usage guidance, and downloadable assets so the palette can move from reference to implementation.

LayerWhat you have hereWhat Pro adds
ScopeOne curated five-color editorial direction.Unlimited access to all collections, broader token coverage, and advanced exports.
OutputVisual palette, copyable CSS preview, and per-color archive pages.Downloadable CSS, JSON, Tailwind, Figma tokens, and Procreate swatches.
Use caseDirection finding, inspiration, and public proof.Real project handoff, implementation, and reusable production assets.
Related guides
Wayfinding Color Systems: Designing Navigation for Hospitals, Transit, and Campuses
How transit systems, hospitals, and airports use color to guide millions of people — the principles behind life-critical color system design.