# #0a291b

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

## Values

- Hex: `#0a291b`
- RGB: rgb(10, 41, 27)
- HSL: hsl(153, 61%, 10%)
- OKLCH: oklch(0.253 0.045 160.8)
- Relative luminance: 0.0173
- Nearest named color: Nightmare (#112211, Δ 2.576) — https://brandsweets.com/colors/nightmare
- Moods: vivid, dark, luxury, bold
- Page: https://brandsweets.com/colors/0a291b

## Tints & shades

- Tints (toward white): #134e33, #1c734c, #249461, #2db97a, #42d191, #67daa6, #8ce3bc, #adebcf, #d2f4e5, #f7fdfa
- Shades (toward black): #092518, #092518, #082116, #082116, #071d13, #061910, #061910, #05150e, #05150e, #04100b

## Harmonies

- Complementary: #290a18
- Analogous: #0a290c, #0a2729
- Triadic: #1b0a29, #291b0a
- Split-complementary: #290a27, #290c0a
- Tetradic: #0c0a29, #290a18, #27290a

## Colors that go with #0a291b

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 #0a291b: softer than #000 and cool enough to feel like part of the same palette. Seen in: Mint Modern (https://brandsweets.com/palettes/modern#mint-modern), Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com), Boeing (https://brandsweets.com/colors/brands/boeing-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: split] — Crimson is a split-complement of #0a291b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: AliExpress (https://brandsweets.com/colors/brands/aliexpress-com), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Svelte (https://brandsweets.com/colors/brands/svelte-dev), New Balance (https://brandsweets.com/colors/brands/newbalance-com). — https://brandsweets.com/colors/crimson
- **Rust** #b7410e [harmony, pool: triadic] — Rust completes a triad with #0a291b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Trailhead (https://brandsweets.com/palettes/warm#trailhead), Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre), Harvest (https://brandsweets.com/palettes/warm#harvest), Gallery (https://brandsweets.com/palettes/editorial#gallery). — https://brandsweets.com/colors/rust
- **Sea Green** #2e8b57 [harmony, pool: analogous] — Sea Green is #0a291b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Subaru (https://brandsweets.com/colors/brands/subaru-com), Wellness (https://brandsweets.com/palettes/warm#wellness), Mushroom (https://brandsweets.com/palettes/neutral#mushroom), Asana (https://brandsweets.com/colors/brands/asana-com). — https://brandsweets.com/colors/seagreen
- **Slate Blue** #6a5acd [harmony, pool: triadic] — Slate Blue completes a triad with #0a291b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: GitLab (https://brandsweets.com/colors/brands/gitlab), Superhuman (https://brandsweets.com/colors/brands/superhuman-com), Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas), Calm (https://brandsweets.com/colors/brands/calm-com). — https://brandsweets.com/colors/slateblue
- **Teal** #008080 [harmony, pool: analogous] — Teal is #0a291b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Alpine (https://brandsweets.com/palettes/cool#alpine), Gusto (https://brandsweets.com/colors/brands/gusto-com), N26 (https://brandsweets.com/colors/brands/n26-com). — https://brandsweets.com/colors/teal
- **Medium Violet Red** #c71585 [harmony, pool: complementary] — Medium Violet Red sits directly opposite #0a291b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: T-Mobile (https://brandsweets.com/colors/brands/t-mobile-com), Bun (https://brandsweets.com/colors/brands/bun-sh). — https://brandsweets.com/colors/mediumvioletred
- **Amber** #ffbf00 [pool] — Amber is paired with #0a291b in 18 real palettes, including Wikipedia's brand system and Google's brand system, as the accent. Seen in: Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Google (https://brandsweets.com/colors/brands/google-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Trailhead (https://brandsweets.com/palettes/warm#trailhead). — https://brandsweets.com/colors/amber

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

- On white (#ffffff): 15.6:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.35:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #218759 (4.67:1); AA: background → #8a8a8a (4.52:1); AAA: text → #2aac72 (7.24:1); AAA: background → #b0b0b0 (7.19:1)

## 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/0a291b-a2beb5-d459cc-1f2d2d-e9f1ea?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: "#0a291b" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.