# Black Box (#0f282f)

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

## Values

- Hex: `#0f282f`
- RGB: rgb(15, 40, 47)
- HSL: hsl(193, 52%, 12%)
- OKLCH: oklch(0.26 0.033 218.6)
- Relative luminance: 0.0182
- Name: Black Box (`black-box`, source: list)
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/black-box

## Tints & shades

- Tints (toward white): #1a4551, #236070, #2f7d93, #3898b2, #51aec8, #73bed3, #92cddd, #b5dde8, #d4ebf2, #f7fbfd
- Shades (toward black): #0d242b, #0c2127, #0c2127, #0b1e23, #0a1a1f, #09171b, #071417, #071417, #061113, #050d10

## Harmonies

- Complementary: #2f160f
- Analogous: #0f2f25, #0f182f
- Triadic: #2f0f28, #282f0f
- Split-complementary: #2f0f18, #2f250f
- Tetradic: #250f2f, #2f160f, #182f0f

## Colors that go with Black Box

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 Black Box: softer than #000 and cool enough to feel like part of the same palette. Seen in: Boeing (https://brandsweets.com/colors/brands/boeing-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine), Volkswagen (https://brandsweets.com/colors/brands/vw-com). — https://brandsweets.com/colors/charcoal
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite Black Box 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), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), Harvest (https://brandsweets.com/palettes/warm#harvest). — https://brandsweets.com/colors/sienna
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is Black Box's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/steelblue
- **Teal** #008080 [harmony, pool: analogous] — Teal is Black Box'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), N26 (https://brandsweets.com/colors/brands/n26-com), Gusto (https://brandsweets.com/colors/brands/gusto-com). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with Black Box 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), Google (https://brandsweets.com/colors/brands/google-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 23 real palettes, including Monzo's brand system and Rolex's brand system put Blue beside Black Box, as the accent. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Rolex (https://brandsweets.com/colors/brands/rolex-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Bumble (https://brandsweets.com/colors/brands/bumble-com). — https://brandsweets.com/colors/blue
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with Black Box 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
- **Blush Pink** #e8b4b8 [pool] — 6 real palettes, including Graphite Mono and Rain Garden put Blush Pink beside Black Box, as the accent. Seen in: Graphite Mono (https://brandsweets.com/palettes/neutral#graphite-mono), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Blush (https://brandsweets.com/palettes/light#blush), Estate (https://brandsweets.com/palettes/luxury#estate). — https://brandsweets.com/colors/blush-pink

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

- On white (#ffffff): 15.39:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.36:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #308197 (4.71:1); AA: background → #8c8c8c (4.58:1); AAA: text → #3ca2be (7.1:1); AAA: background → #b0b0b0 (7.09:1)

## Brands using this color

- **Subaru** — text #1d252c (Δ 1.939) — https://brandsweets.com/colors/brands/subaru-com

## 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/0f282f-a2b5be-df4e75-1f242d-e9f1ef?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: "#0f282f" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.