# #181e59

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

## Values

- Hex: `#181e59`
- RGB: rgb(24, 30, 89)
- HSL: hsl(234, 58%, 22%)
- OKLCH: oklch(0.272 0.105 272.8)
- Relative luminance: 0.0184
- Nearest named color: Dark Soul (#112255, Δ 1.504) — https://brandsweets.com/colors/dark-soul
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/181e59

## Tints & shades

- Tints (toward white): #202979, #283395, #303eb5, #3e4ccc, #5e6ad4, #7e88dd, #9aa2e4, #bbc0ed, #d7daf4, #f7f8fd
- Shades (toward black): #151b51, #131949, #121744, #10153c, #0e1234, #0c0f2c, #0a0c24, #090b20, #060818, #040510

## Harmonies

- Complementary: #595218
- Analogous: #183f59, #321859
- Triadic: #59181e, #1e5918
- Split-complementary: #593218, #3f5918
- Tetradic: #59183f, #595218, #185932

## Colors that go with #181e59

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 #181e59: softer than #000 and cool enough to feel like part of the same palette. Seen in: Plaid (https://brandsweets.com/colors/brands/plaid-com), CeraVe (https://brandsweets.com/colors/brands/cerave-com), Microsoft (https://brandsweets.com/colors/brands/microsoft-com), Volkswagen (https://brandsweets.com/colors/brands/vw-com). — https://brandsweets.com/colors/charcoal
- **Dark Olive Green** #556b2f [harmony, pool: split] — Dark Olive Green is a split-complement of #181e59: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Cohere (https://brandsweets.com/colors/brands/cohere-com), 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), Warp (https://brandsweets.com/colors/brands/warp-dev), Oatmeal (https://brandsweets.com/palettes/neutral#oatmeal). — https://brandsweets.com/colors/darkolivegreen
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #181e59 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com), Subaru (https://brandsweets.com/colors/brands/subaru-com), Intel (https://brandsweets.com/colors/brands/intel-com). — https://brandsweets.com/colors/seagreen
- **Slate Blue** #6a5acd [harmony, pool: analogous] — Slate Blue is #181e59's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Marvel (https://brandsweets.com/colors/brands/marvel-com), Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas), Superhuman (https://brandsweets.com/colors/brands/superhuman-com), Sentry (https://brandsweets.com/colors/brands/sentry-io). — https://brandsweets.com/colors/slateblue
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #181e59's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Plaid (https://brandsweets.com/colors/brands/plaid-com), Discover (https://brandsweets.com/colors/brands/discover-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Deep Water (https://brandsweets.com/palettes/dark#deep-water). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #181e59 in 7 real palettes, including Southwest Airlines's brand system and Beach Hut, as the accent. Seen in: Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Blueprint (https://brandsweets.com/palettes/technical#blueprint), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 14 real palettes, including Monzo's brand system and Sketch's brand system put Blue beside #181e59, as the accent. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Sketch (https://brandsweets.com/colors/brands/sketch-com), Penpot (https://brandsweets.com/colors/brands/penpot-app), League of Legends (https://brandsweets.com/colors/brands/leagueoflegends-com). — https://brandsweets.com/colors/blue
- **Burlywood** #deb887 [pool] — Burlywood is paired with #181e59 in 4 real palettes, including Coastal and Chalkboard, as the accent. Seen in: Coastal (https://brandsweets.com/palettes/cool#coastal), Chalkboard (https://brandsweets.com/palettes/dark#chalkboard), Kiln (https://brandsweets.com/palettes/dark#kiln), Polaroid (https://brandsweets.com/palettes/light#polaroid). — https://brandsweets.com/colors/burlywood

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

- On white (#ffffff): 15.34:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.37:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #626dd5 (4.67:1); AA: background → #8c8c8c (4.56:1); AAA: text → #868fdf (7.01:1); AAA: background → #b0b0b0 (7.07:1)

## Fonts for this mood

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

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/181e59-9d9cc4-df8a4e-241f2d-e9eef1?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: "#181e59" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.