# #031d49

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

## Values

- Hex: `#031d49`
- RGB: rgb(3, 29, 73)
- HSL: hsl(218, 92%, 15%)
- OKLCH: oklch(0.243 0.088 259.7)
- Relative luminance: 0.0138
- Nearest named color: Midnight Mirage (#001f3f, Δ 2.086) — https://brandsweets.com/colors/midnight-mirage
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/031d49

## Tints & shades

- Tints (toward white): #052c71, #073e9d, #084dc4, #0a5ceb, #2c76f6, #5490f8, #7ba9f9, #a2c3fb, #cedffd, #f5f9ff
- Shades (toward black): #031b45, #031940, #02173b, #021536, #021331, #020f27, #010d22, #010c1d, #010a18, #010814

## Harmonies

- Complementary: #493003
- Analogous: #034049, #0c0349
- Triadic: #49031d, #1d4903
- Split-complementary: #490c03, #404903
- Tetradic: #490340, #493003, #03490c

## Colors that go with #031d49

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

- **Blue Violet** #8a2be2 [harmony, pool: analogous] — Blue Violet is #031d49's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: ClickUp (https://brandsweets.com/colors/brands/clickup-com), Yahoo (https://brandsweets.com/colors/brands/yahoo-com), Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Prepare your taste buds... (https://brandsweets.com/colors/brands/grubhub-com). — https://brandsweets.com/colors/blueviolet
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #031d49: softer than #000 and cool enough to feel like part of the same palette. Seen in: Plaid (https://brandsweets.com/colors/brands/plaid-com), Microsoft (https://brandsweets.com/colors/brands/microsoft-com), Volkswagen (https://brandsweets.com/colors/brands/vw-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #031d49 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Formula 1 (https://brandsweets.com/colors/brands/formula1-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com), Chase (https://brandsweets.com/colors/brands/chase-com), Pinterest (https://brandsweets.com/colors/brands/pinterest-com). — https://brandsweets.com/colors/crimson
- **Sienna** #a0522d [harmony, pool: split] — Sienna is a split-complement of #031d49: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Oatly (https://brandsweets.com/colors/brands/oatly-com). — https://brandsweets.com/colors/sienna
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #031d49's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Plaid (https://brandsweets.com/colors/brands/plaid-com), Discover (https://brandsweets.com/colors/brands/discover-com), Deep Water (https://brandsweets.com/palettes/dark#deep-water). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #031d49 in 16 real palettes, including Southwest Airlines's brand system and Blueprint, as the accent. Seen in: Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 18 real palettes, including Monzo's brand system and Penpot's brand system put Blue beside #031d49, as the accent. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Penpot (https://brandsweets.com/colors/brands/penpot-app), League of Legends (https://brandsweets.com/colors/brands/leagueoflegends-com), Sketch (https://brandsweets.com/colors/brands/sketch-com). — https://brandsweets.com/colors/blue
- **Blush Pink** #e8b4b8 [pool] — 5 real palettes, including Graphite Mono and Estate put Blush Pink beside #031d49, as the accent. Seen in: Graphite Mono (https://brandsweets.com/palettes/neutral#graphite-mono), Estate (https://brandsweets.com/palettes/luxury#estate), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Cartier (https://brandsweets.com/colors/brands/cartier-com). — https://brandsweets.com/colors/blush-pink

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

- On white (#ffffff): 16.46:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.28:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #1e6df6 (4.57:1); AA: background → #878787 (4.58:1); AAA: text → #5d96f8 (7.18:1); AAA: background → #ababab (7.17:1)

## Brands using this color

- **Spectrum** — secondary #00194a (Δ 1.337) — https://brandsweets.com/colors/brands/spectrum-com
- **MLB** — primary #041e42 (Δ 1.384) — https://brandsweets.com/colors/brands/mlb-com
- **British Airways** — accent #021b41 (Δ 1.632) — https://brandsweets.com/colors/brands/britishairways-com

## 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/031d49-9ca6c4-df644e-201f2d-e9f0f1?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: "#031d49" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.