# #221b36

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

## Values

- Hex: `#221b36`
- RGB: rgb(34, 27, 54)
- HSL: hsl(256, 33%, 16%)
- OKLCH: oklch(0.245 0.051 294.3)
- Relative luminance: 0.0139
- Nearest named color: Eclipse Elixir (#1f2133, Δ 2.233) — https://brandsweets.com/colors/eclipse-elixir
- Moods: cool, muted, dark, luxury, bold
- Page: https://brandsweets.com/colors/221b36

## Tints & shades

- Tints (toward white): #342951, #45376d, #58468b, #6a54a6, #806db6, #9888c3, #b0a3d1, #cac2e0, #e2ddee, #f9f8fc
- Shades (toward black): #201a33, #1e182f, #1a1529, #181325, #161122, #130f1f, #110e1b, #0d0a14, #0b0911, #09070e

## Harmonies

- Complementary: #2f361b
- Analogous: #1b2236, #301b36
- Triadic: #36231b, #1b3623
- Split-complementary: #36301b, #22361b
- Tetradic: #361b22, #2f361b, #1b3630

## Colors that go with #221b36

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 #221b36: softer than #000 and cool enough to feel like part of the same palette. Seen in: Volkswagen (https://brandsweets.com/colors/brands/vw-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), Microsoft (https://brandsweets.com/colors/brands/microsoft-com), Asana (https://brandsweets.com/colors/brands/asana-com). — https://brandsweets.com/colors/charcoal
- **Dark Olive Green** #556b2f [harmony, pool: complementary] — Dark Olive Green sits directly opposite #221b36 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Cohere (https://brandsweets.com/colors/brands/cohere-com), Warp (https://brandsweets.com/colors/brands/warp-dev), 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), Clay & Linen (https://brandsweets.com/palettes/warm#clay-and-linen). — https://brandsweets.com/colors/darkolivegreen
- **Sea Green** #2e8b57 [harmony, pool: split] — Sea Green is a split-complement of #221b36: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Subaru (https://brandsweets.com/colors/brands/subaru-com), Wellness (https://brandsweets.com/palettes/warm#wellness), Next.js (https://brandsweets.com/colors/brands/nextjs-org). — https://brandsweets.com/colors/seagreen
- **Sienna** #a0522d [harmony, pool: triadic] — Sienna completes a triad with #221b36 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), Harvest (https://brandsweets.com/palettes/warm#harvest). — https://brandsweets.com/colors/sienna
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #221b36's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Discover (https://brandsweets.com/colors/brands/discover-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop). — https://brandsweets.com/colors/steelblue
- **Teal** #008080 [harmony, pool: triadic] — Teal completes a triad with #221b36 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Alpine (https://brandsweets.com/palettes/cool#alpine), Clinic (https://brandsweets.com/palettes/clean#clinic), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), N26 (https://brandsweets.com/colors/brands/n26-com). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #221b36 in 18 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), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Beach Hut (https://brandsweets.com/palettes/light#beach-hut). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 22 real palettes, including Sketch's brand system and Monzo's brand system put Blue beside #221b36, as the accent. Seen in: Sketch (https://brandsweets.com/colors/brands/sketch-com), Monzo (https://brandsweets.com/colors/brands/monzo-com), Warp (https://brandsweets.com/colors/brands/warp-dev), Bumble (https://brandsweets.com/colors/brands/bumble-com). — https://brandsweets.com/colors/blue

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

- On white (#ffffff): 16.43:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.28:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #7e6ab4 (4.61:1); AA: background → #878787 (4.57:1); AAA: text → #9e8fc7 (7.21:1); AAA: background → #ababab (7.16:1)

## Fonts for this mood

- 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/221b36-ab9cc4-dfbf4e-291f2d-e9ebf1?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: "#221b36" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.