# #0a2939

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

## Values

- Hex: `#0a2939`
- RGB: rgb(10, 41, 57)
- HSL: hsl(200, 70%, 13%)
- OKLCH: oklch(0.267 0.047 235)
- Relative luminance: 0.0195
- Nearest named color: Black Box (#0f282f, Δ 1.845) — https://brandsweets.com/colors/black-box
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/0a2939

## Tints & shades

- Tints (toward white): #11455f, #175e82, #1e7ba9, #2494cc, #40a9dd, #63b9e3, #8acaea, #addaf0, #d4ebf7, #f6fbfd
- Shades (toward black): #092634, #082330, #081f2b, #071c27, #071c27, #061923, #05161e, #05131a, #041016, #030d11

## Harmonies

- Complementary: #38190a
- Analogous: #0a3831, #0a1238
- Triadic: #380a29, #29380a
- Split-complementary: #380a12, #38310a
- Tetradic: #310a38, #38190a, #12380a

## Colors that go with #0a2939

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 #0a2939: softer than #000 and cool enough to feel like part of the same palette. Seen in: 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), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: split] — Crimson is a split-complement of #0a2939: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Vodafone (https://brandsweets.com/colors/brands/vodafone-com), Svelte (https://brandsweets.com/colors/brands/svelte-dev), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), AliExpress (https://brandsweets.com/colors/brands/aliexpress-com). — https://brandsweets.com/colors/crimson
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #0a2939's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: GEICO (https://brandsweets.com/colors/brands/geico-com), Subaru (https://brandsweets.com/colors/brands/subaru-com), Telehealth (https://brandsweets.com/palettes/modern#telehealth), GitHub (https://brandsweets.com/colors/brands/github). — https://brandsweets.com/colors/royalblue
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #0a2939 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Harvest (https://brandsweets.com/palettes/warm#harvest). — https://brandsweets.com/colors/sienna
- **Teal** #008080 [harmony, pool: analogous] — Teal is #0a2939's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Alpine (https://brandsweets.com/palettes/cool#alpine), Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), Clinic (https://brandsweets.com/palettes/clean#clinic). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #0a2939 in 18 real palettes, including Beach Hut and Wikipedia's brand system, as the supporting colour. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 24 real palettes, including Monzo's brand system and Readymag's brand system put Blue beside #0a2939, as the accent. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Rolex (https://brandsweets.com/colors/brands/rolex-com), Bumble (https://brandsweets.com/colors/brands/bumble-com). — https://brandsweets.com/colors/blue
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with #0a2939 in 9 real palettes, including ClickUp's brand system and Yahoo's brand system, as the lead colour. Seen in: ClickUp (https://brandsweets.com/colors/brands/clickup-com), Yahoo (https://brandsweets.com/colors/brands/yahoo-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): 15.12:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.39:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #1f7ead (4.65:1); AA: background → #8f8f8f (4.67:1); AAA: text → #2b9fda (7.07:1); AAA: background → #b3b3b3 (7.21:1)

## Curated palettes containing it

- **Beach Hut** (summer, light, clean, cool) — #2e86ab, #f6bd60, #f28482, #fbfcfd, #1b2a38 — Sea blue with sun-bleached yellow and a coral — striped-canvas summer, softened so it works on a screen. — tool: https://brandsweets.com/palettes/new/2e86ab-f6bd60-f28482-fbfcfd-1b2a38 — collection: https://brandsweets.com/palettes/summer

## 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/0a2939-9cb2c4-df4e64-1f232d-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: "#0a2939" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.