# #1b5d64

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

## Values

- Hex: `#1b5d64`
- RGB: rgb(27, 93, 100)
- HSL: hsl(186, 57%, 25%)
- OKLCH: oklch(0.441 0.065 205.3)
- Relative luminance: 0.0898
- Nearest named color: Beau Vert (#0c6064, Δ 1.091) — https://brandsweets.com/colors/beau-vert
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/1b5d64

## Tints & shades

- Tints (toward white): #237780, #2c95a0, #34afbc, #47bfcd, #67cad5, #83d4dd, #9fdee5, #bbe7ec, #dbf3f5, #f7fcfd
- Shades (toward black): #19555c, #174e54, #15474c, #133f44, #10383c, #0d2d30, #0b2528, #091e20, #071618, #040f10

## Harmonies

- Complementary: #64231b
- Analogous: #1b6447, #1b3864
- Triadic: #641b5d, #5d641b
- Split-complementary: #641b38, #64471b
- Tetradic: #471b64, #64231b, #38641b

## Colors that go with #1b5d64

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Crimson** #dc143c [harmony, pool: complementary] — Crimson sits directly opposite #1b5d64 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Wendy's (https://brandsweets.com/colors/brands/wendys-com), Costco (https://brandsweets.com/colors/brands/costco-com). — https://brandsweets.com/colors/crimson
- **Blue** #0000ff [pool] — 6 real palettes, including Rolex's brand system and Jeep's brand system put Blue beside #1b5d64, as the accent. Seen in: Rolex (https://brandsweets.com/colors/brands/rolex-com), Jeep (https://brandsweets.com/colors/brands/jeep-com), Warp (https://brandsweets.com/colors/brands/warp-dev), Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com). — https://brandsweets.com/colors/blue
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #1b5d64: 4 real palettes, including Paper & Pine and Alpine, as the supporting colour. Seen in: Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine), Alpine (https://brandsweets.com/palettes/cool#alpine), Open House (https://brandsweets.com/palettes/clean#open-house), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/cadetblue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #1b5d64: 11 real palettes, including HP's brand system and Hinge's brand system, as the accent. Seen in: HP (https://brandsweets.com/colors/brands/hp-com), Hinge (https://brandsweets.com/colors/brands/hinge-co), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Starlink (https://brandsweets.com/colors/brands/starlink-com). — https://brandsweets.com/colors/denim
- **Goldenrod** #daa520 [pool] — Goldenrod shows up next to #1b5d64 in 5 real palettes, including Fireside and Mid-Century, as the accent. Seen in: Fireside (https://brandsweets.com/palettes/dark#fireside), Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Open House (https://brandsweets.com/palettes/clean#open-house), Disney (https://brandsweets.com/colors/brands/disney-com). — https://brandsweets.com/colors/goldenrod
- **Medium Sea Green** #3cb371 [pool] — Medium Sea Green is paired with #1b5d64 in 4 real palettes, including Mint Modern and Console Light, as the lead colour. Seen in: Mint Modern (https://brandsweets.com/palettes/modern#mint-modern), Console Light (https://brandsweets.com/palettes/technical#console-light), Undergrowth (https://brandsweets.com/palettes/dark#undergrowth), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/mediumseagreen
- **Midnight Blue** #191970 [pool] — 7 real palettes, including Lufthansa's brand system and Open House put Midnight Blue beside #1b5d64, as the lead colour. Seen in: Lufthansa (https://brandsweets.com/colors/brands/lufthansa-com), Open House (https://brandsweets.com/palettes/clean#open-house), First Snow (https://brandsweets.com/palettes/cool#first-snow), FIFA (https://brandsweets.com/colors/brands/fifa-com). — https://brandsweets.com/colors/midnightblue
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #1b5d64: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy. — https://brandsweets.com/colors/whitesmoke

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

- On white (#ffffff): 7.51:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.8:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #26828c (4.65:1); AA: background → #c9c9c9 (4.54:1); AAA: text → #31a7b4 (7.32:1); AAA: background → #f7f7f7 (7.01:1)

## Brands using this color

- **Pampers** — accent #0a6365 (Δ 1.916) — https://brandsweets.com/colors/brands/pampers-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/1b5d64-a2b8be-df4e86-1f262d-e9f1ee?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: "#1b5d64" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.