# #151c2d

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

## Values

- Hex: `#151c2d`
- RGB: rgb(21, 28, 45)
- HSL: hsl(223, 36%, 13%)
- OKLCH: oklch(0.228 0.035 266.6)
- Relative luminance: 0.0118
- Nearest named color: Dark Knight (#151931, Δ 1.453) — https://brandsweets.com/colors/dark-knight
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/151c2d

## Tints & shades

- Tints (toward white): #242f4c, #314168, #405487, #4d65a3, #667db7, #8295c4, #a1afd3, #bdc7e0, #dce2ef, #f8f9fc
- Shades (toward black): #141a2a, #121826, #101623, #0f131f, #0f131f, #0d111c, #0b0f18, #0a0d15, #080b11, #07090e

## Harmonies

- Complementary: #2d2615
- Analogous: #15282d, #1a152d
- Triadic: #2d151c, #1c2d15
- Split-complementary: #2d1a15, #282d15
- Tetradic: #2d1528, #2d2615, #152d1a

## Colors that go with #151c2d

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 #151c2d: softer than #000 and cool enough to feel like part of the same palette. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Audi (https://brandsweets.com/colors/brands/audi-com), Vimeo (https://brandsweets.com/colors/brands/vimeo-com), Volkswagen (https://brandsweets.com/colors/brands/vw-com). — https://brandsweets.com/colors/charcoal
- **Dark Olive Green** #556b2f [harmony, pool: complementary] — Dark Olive Green sits directly opposite #151c2d 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), Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre). — https://brandsweets.com/colors/darkolivegreen
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #151c2d — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Subaru (https://brandsweets.com/colors/brands/subaru-com), Next.js (https://brandsweets.com/colors/brands/nextjs-org), Kia (https://brandsweets.com/colors/brands/kia-com). — https://brandsweets.com/colors/seagreen
- **Sienna** #a0522d [harmony, pool: split] — Sienna is a split-complement of #151c2d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Oatly (https://brandsweets.com/colors/brands/oatly-com). — https://brandsweets.com/colors/sienna
- **Slate Blue** #6a5acd [harmony, pool: analogous] — Slate Blue is #151c2d's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas), GitLab (https://brandsweets.com/colors/brands/gitlab), Sentry (https://brandsweets.com/colors/brands/sentry-io), Superhuman (https://brandsweets.com/colors/brands/superhuman-com). — https://brandsweets.com/colors/slateblue
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #151c2d's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Launch Orange (https://brandsweets.com/palettes/bold#launch-orange), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Discover (https://brandsweets.com/colors/brands/discover-com). — https://brandsweets.com/colors/steelblue
- **Amber** #ffbf00 [pool] — Amber is paired with #151c2d in 18 real palettes, including Blueprint and Warner Bros.'s brand system, as the accent. Seen in: Blueprint (https://brandsweets.com/palettes/technical#blueprint), Warner Bros. (https://brandsweets.com/colors/brands/warnerbros-com), Google (https://brandsweets.com/colors/brands/google-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 23 real palettes, including Warp's brand system and Monzo's brand system put Blue beside #151c2d, as the supporting colour. Seen in: Warp (https://brandsweets.com/colors/brands/warp-dev), Monzo (https://brandsweets.com/colors/brands/monzo-com), Signal (https://brandsweets.com/colors/brands/signal-org), League of Legends (https://brandsweets.com/colors/brands/leagueoflegends-com). — https://brandsweets.com/colors/blue

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

- On white (#ffffff): 16.99:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.24:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #5c74b2 (4.6:1); AA: background → #858585 (4.6:1); AAA: text → #8295c4 (7.05:1); AAA: background → #a8a8a8 (7.15:1)

## Brands using this color

- **Asana** — secondary #151b26 (Δ 1.35) — https://brandsweets.com/colors/brands/asana-com
- **Airtable** — accent #181d26 (Δ 1.594) — https://brandsweets.com/colors/brands/airtable-com
- **Audi** — secondary #181d25 (Δ 1.779) — https://brandsweets.com/colors/brands/audi-com
- **Qatar Airways** — secondary #181825 (Δ 1.838) — https://brandsweets.com/colors/brands/qatarairways-com
- **NFL** — accent #172029 (Δ 1.888) — https://brandsweets.com/colors/brands/nfl-com
- **Formula 1** — text #1c1c25 (Δ 1.931) — https://brandsweets.com/colors/brands/formula1-com

## Curated palettes containing it

- **Indigo SaaS** (modern, cool, clean) — #4f46e5, #6b7280, #10b981, #ffffff, #111827 — The dependable indigo-and-emerald B2B pairing: indigo for primary actions, emerald reserved for success states. — tool: https://brandsweets.com/palettes/new/4f46e5-6b7280-10b981-ffffff-111827 — collection: https://brandsweets.com/palettes/modern
- **Arctic** (clean, cool, minimal) — #0f1b2d, #7d93a8, #0ea5e9, #ffffff — Navy type on white with an ice-blue accent: crisp and corporate without going grey. — tool: https://brandsweets.com/palettes/new/0f1b2d-7d93a8-0ea5e9-ffffff — collection: https://brandsweets.com/palettes/clean
- **Cobalt Pop** (bold, cool, vivid, modern) — #1e40af, #111827, #fb7185, #ffffff — One deep cobalt and one hot pink on white — a two-accent system for launches and campaign pages that need punch. — tool: https://brandsweets.com/palettes/new/1e40af-111827-fb7185-ffffff — collection: https://brandsweets.com/palettes/bold
- **Sapphire & Gold** (jewel-tones, luxury, cool, elegant) — #1e3a8a, #c9a227, #0e7490, #f7f6f2, #111827 — Deep sapphire and gold with a teal — old-money jewel tones on an ivory ground; heraldic without a crest. — tool: https://brandsweets.com/palettes/new/1e3a8a-c9a227-0e7490-f7f6f2-111827 — collection: https://brandsweets.com/palettes/jewel-tones
- **Peacock** (jewel-tones, vivid, cool, bold) — #0d9488, #1d4ed8, #a21caf, #ffffff, #0c1a2b — Teal, cobalt and magenta at full chroma on white — jewel tones in daylight; the trick is a near-black text with a blue cast. — tool: https://brandsweets.com/palettes/new/0d9488-1d4ed8-a21caf-ffffff-0c1a2b — collection: https://brandsweets.com/palettes/jewel-tones

## 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/151c2d-9ca3c4-df704e-211f2d-e9eff1?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: "#151c2d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.