# #031b2a

A color — cool, vivid, dark, technical, modern, luxury, bold. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#031b2a`
- RGB: rgb(3, 27, 42)
- HSL: hsl(203, 87%, 9%)
- OKLCH: oklch(0.212 0.043 239)
- Relative luminance: 0.0097
- Nearest named color: Midnight Dreams (#002233, Δ 2.741) — https://brandsweets.com/colors/midnight-dreams
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/031b2a

## Tints & shades

- Tints (toward white): #063756, #095381, #0c6eac, #0f8ad7, #24a2f0, #4ab2f2, #75c4f5, #a0d6f8, #cbe9fb, #f5fbfe
- Shades (toward black): #031c2b, #031926, #031926, #021521, #021521, #02121d, #02121d, #020f18, #020f18, #010c13

## Harmonies

- Complementary: #2b1203
- Analogous: #032b26, #03082b
- Triadic: #2b031c, #1c2b03
- Split-complementary: #2b0308, #2b2603
- Tetradic: #26032b, #2b1203, #082b03

## Colors that go with #031b2a

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #031b2a: softer than #000 and cool enough to feel like part of the same palette. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Vimeo (https://brandsweets.com/colors/brands/vimeo-com), Audi (https://brandsweets.com/colors/brands/audi-com), Puma (https://brandsweets.com/colors/brands/puma-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: split] — Crimson is a split-complement of #031b2a: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Chase (https://brandsweets.com/colors/brands/chase-com), Formula 1 (https://brandsweets.com/colors/brands/formula1-com), Huawei (https://brandsweets.com/colors/brands/huawei-com), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com). — https://brandsweets.com/colors/crimson
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #031b2a's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Cisco (https://brandsweets.com/colors/brands/cisco-com), Slate Workspace (https://brandsweets.com/palettes/minimal#slate-workspace), MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Chase (https://brandsweets.com/colors/brands/chase-com). — https://brandsweets.com/colors/royalblue
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #031b2a on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Oatly (https://brandsweets.com/colors/brands/oatly-com), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), BrandSweets (https://brandsweets.com/colors/brands/brandsweets). — https://brandsweets.com/colors/sienna
- **Teal** #008080 [harmony, pool: analogous] — Teal is #031b2a's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Clinic (https://brandsweets.com/palettes/clean#clinic), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), Alpine (https://brandsweets.com/palettes/cool#alpine), Perplexity (https://brandsweets.com/colors/brands/perplexity). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #031b2a in 18 real palettes, including Blueprint and Southwest Airlines's brand system, as the accent. Seen in: Blueprint (https://brandsweets.com/palettes/technical#blueprint), Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 24 real palettes, including Monzo's brand system and MongoDB's brand system put Blue beside #031b2a, as the accent. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), MongoDB (https://brandsweets.com/colors/brands/mongodb-com), League of Legends (https://brandsweets.com/colors/brands/leagueoflegends-com), Kia (https://brandsweets.com/colors/brands/kia-com). — https://brandsweets.com/colors/blue
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with #031b2a in 10 real palettes, including Yahoo's brand system and ClickUp's brand system, as the supporting colour. Seen in: Yahoo (https://brandsweets.com/colors/brands/yahoo-com), ClickUp (https://brandsweets.com/colors/brands/clickup-com), Prepare your taste buds... (https://brandsweets.com/colors/brands/grubhub-com), Klarna US (https://brandsweets.com/colors/brands/klarna-com). — https://brandsweets.com/colors/blueviolet

## Contrast (WCAG 2.x, as text)

- On white (#ffffff): 17.59:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.19:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0d7bbf (4.6:1); AA: background → #828282 (4.58:1); AAA: text → #1a9def (7.11:1); AAA: background → #a6a6a6 (7.22:1)

## Brands using this color

- **Cisco** — primary #07182d (Δ 1.412) — https://brandsweets.com/colors/brands/cisco-com
- **Cisco** — text #07182d (Δ 1.412) — https://brandsweets.com/colors/brands/cisco-com
- **Monzo** — text #091723 (Δ 1.794) — https://brandsweets.com/colors/brands/monzo-com

## Curated palettes containing it

- **Blueprint** (technical, cool, modern, dark) — #38bdf8, #818cf8, #fbbf24, #0f172a, #e2e8f0 — Cyan and indigo on navy is the developer-tool look; amber is the only warm note, so it always reads as 'attention'. — tool: https://brandsweets.com/palettes/new/38bdf8-818cf8-fbbf24-0f172a-e2e8f0 — collection: https://brandsweets.com/palettes/technical
- **Indigo SaaS** (modern, cool, clean) — #4f46e5, #6b7280, #10b981, #ffffff, #111827 — The dependable indigo-and-emerald B2B pairing: indigo for primary actions, emerald reserved for success states. — tool: https://brandsweets.com/palettes/new/4f46e5-6b7280-10b981-ffffff-111827 — collection: https://brandsweets.com/palettes/modern
- **Slate Workspace** (minimal, cool, clean, modern) — #0f172a, #64748b, #2563eb, #f8fafc — Slate on slate with a single blue — the productivity-app look where the interface disappears behind the work. — tool: https://brandsweets.com/palettes/new/0f172a-64748b-2563eb-f8fafc — collection: https://brandsweets.com/palettes/minimal
- **Clinic** (clean, cool, light) — #0e7490, #64748b, #f97316, #f8fafc, #0f172a — Teal reads clinical without the coldness of pure blue; the coral accent adds warmth for reassurance moments. — tool: https://brandsweets.com/palettes/new/0e7490-64748b-f97316-f8fafc-0f172a — collection: https://brandsweets.com/palettes/clean
- **Arctic** (clean, cool, minimal) — #0f1b2d, #7d93a8, #0ea5e9, #ffffff — Navy type on white with an ice-blue accent: crisp and corporate without going grey. — tool: https://brandsweets.com/palettes/new/0f1b2d-7d93a8-0ea5e9-ffffff — collection: https://brandsweets.com/palettes/clean
- **Cobalt Pop** (bold, cool, vivid, modern) — #1e40af, #111827, #fb7185, #ffffff — One deep cobalt and one hot pink on white — a two-accent system for launches and campaign pages that need punch. — tool: https://brandsweets.com/palettes/new/1e40af-111827-fb7185-ffffff — collection: https://brandsweets.com/palettes/bold
- **Sapphire & Gold** (jewel-tones, luxury, cool, elegant) — #1e3a8a, #c9a227, #0e7490, #f7f6f2, #111827 — Deep sapphire and gold with a teal — old-money jewel tones on an ivory ground; heraldic without a crest. — tool: https://brandsweets.com/palettes/new/1e3a8a-c9a227-0e7490-f7f6f2-111827 — collection: https://brandsweets.com/palettes/jewel-tones
- **Peacock** (jewel-tones, vivid, cool, bold) — #0d9488, #1d4ed8, #a21caf, #ffffff, #0c1a2b — Teal, cobalt and magenta at full chroma on white — jewel tones in daylight; the trick is a near-black text with a blue cast. — tool: https://brandsweets.com/palettes/new/0d9488-1d4ed8-a21caf-ffffff-0c1a2b — collection: https://brandsweets.com/palettes/jewel-tones

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- modern: https://brandsweets.com/fonts/mood/modern
- luxury: https://brandsweets.com/fonts/mood/luxury
- bold: https://brandsweets.com/fonts/mood/bold

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/031b2a-9cb0c4-df4e5d-1f222d-e9f1f0?lock=0&style=vibrant
(Humans lock/regenerate in the tool; the URL is the state — read `lock=` back to see what they kept.)

## Connect an agent

Point any MCP client at the BrandSweets colors endpoint for the same engine:

- Endpoint: https://mcp.brandsweets.com/colors/mcp
- Tools: `analyze_color` (e.g. `analyze_color({ color: "#031b2a" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.