# #0f273d

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

## Values

- Hex: `#0f273d`
- RGB: rgb(15, 39, 61)
- HSL: hsl(209, 61%, 15%)
- OKLCH: oklch(0.266 0.051 248.5)
- Relative luminance: 0.0189
- Nearest named color: Eternal Darkness (#1c2841, Δ 1.903) — https://brandsweets.com/colors/eternal-darkness
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/0f273d

## Tints & shades

- Tints (toward white): #173c5e, #205383, #2868a4, #307dc5, #4e94d4, #6fa8dc, #90bce4, #b1d0ec, #d6e6f5, #f7fafd
- Shades (toward black): #0e2439, #0d2235, #0c1f31, #0b1d2d, #0a1a29, #081521, #07121d, #061019, #050d15, #040a10

## Harmonies

- Complementary: #3e250f
- Analogous: #0f3e3d, #0f103e
- Triadic: #3e0f27, #273e0f
- Split-complementary: #3e0f10, #3e3d0f
- Tetradic: #3d0f3e, #3e250f, #103e0f

## Colors that go with #0f273d

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 #0f273d: 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
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #0f273d 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
- **Slate Blue** #6a5acd [harmony, pool: analogous] — Slate Blue is #0f273d's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Superhuman (https://brandsweets.com/colors/brands/superhuman-com), GitLab (https://brandsweets.com/colors/brands/gitlab), Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/slateblue
- **Teal** #008080 [harmony, pool: analogous] — Teal is #0f273d'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), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), Clinic (https://brandsweets.com/palettes/clean#clinic), Mid-Century (https://brandsweets.com/palettes/warm#mid-century). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #0f273d in 18 real palettes, including Beach Hut and Southwest Airlines's brand system, as the supporting colour. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 24 real palettes, including Monzo's brand system and Sketch's brand system put Blue beside #0f273d, as the accent. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Sketch (https://brandsweets.com/colors/brands/sketch-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Rolex (https://brandsweets.com/colors/brands/rolex-com). — https://brandsweets.com/colors/blue
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with #0f273d 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 #0f273d, 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): 15.24:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.38:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #2e78bd (4.54:1); AA: background → #8c8c8c (4.53:1); AAA: text → #5b9bd7 (7.11:1); AAA: background → #b0b0b0 (7.03:1)

## Brands using this color

- **Microsoft** — accent #17253d (Δ 1.083) — https://brandsweets.com/colors/brands/microsoft-com
- **Monzo** — primary #14233c (Δ 1.37) — https://brandsweets.com/colors/brands/monzo-com

## 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/0f273d-9cacc4-df4e4e-1f212d-e9f1f1?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: "#0f273d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.