# #137d8b

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

## Values

- Hex: `#137d8b`
- RGB: rgb(19, 125, 139)
- HSL: hsl(187, 76%, 31%)
- OKLCH: oklch(0.542 0.089 209.1)
- Relative luminance: 0.1667
- Nearest named color: Bermuda (#1b7d8d, Δ 0.466) — https://brandsweets.com/colors/bermuda
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/137d8b

## Tints & shades

- Tints (toward white): #1799ab, #1bb2c5, #23cbe1, #43d2e5, #62daea, #7de0ed, #9ce8f2, #bceff6, #d7f5f9, #f6fdfe
- Shades (toward black): #11717e, #106975, #0e5d67, #0c515a, #0b4951, #093d43, #073036, #062428, #041c1f, #021012

## Harmonies

- Complementary: #8b2113
- Analogous: #138b5d, #13418b
- Triadic: #8b137d, #7d8b13
- Split-complementary: #8b1341, #8b5d13
- Tetradic: #5d138b, #8b2113, #418b13

## Colors that go with #137d8b

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 #137d8b: softer than #000 and cool enough to feel like part of the same palette. Seen in: Gusto (https://brandsweets.com/colors/brands/gusto-com), N26 (https://brandsweets.com/colors/brands/n26-com), Auth0 (https://brandsweets.com/colors/brands/auth0-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: complementary] — Crimson sits directly opposite #137d8b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Redfin (https://brandsweets.com/colors/brands/redfin-com), Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Wendy's (https://brandsweets.com/colors/brands/wendys-com). — https://brandsweets.com/colors/crimson
- **Amber** #ffbf00 [pool] — Amber is paired with #137d8b in 4 real palettes, including Beach Hut and Lemon Squeezy's brand system, as the supporting colour. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Wired (https://brandsweets.com/colors/brands/wired-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #137d8b: 6 real palettes, including Glacier and Fintech Trust, as the accent. Seen in: Glacier (https://brandsweets.com/palettes/cool#glacier), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Hershey's (https://brandsweets.com/colors/brands/hersheys-com), Ink & Paper (https://brandsweets.com/palettes/minimal#ink-and-paper). — https://brandsweets.com/colors/cobalt
- **Copper** #b87333 [pool] — Designers have shipped Copper with #137d8b: 5 real palettes, including Riverbed and Wellness, as the accent. Seen in: Riverbed (https://brandsweets.com/palettes/muted#riverbed), Wellness (https://brandsweets.com/palettes/warm#wellness), Desert Road (https://brandsweets.com/palettes/warm#desert-road), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/copper
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #137d8b: 5 real palettes, including Deep Water and Venmo's brand system, as the lead colour. Seen in: Deep Water (https://brandsweets.com/palettes/dark#deep-water), Venmo (https://brandsweets.com/colors/brands/venmo-com), Telegram (https://brandsweets.com/colors/brands/telegram-org), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/deepskyblue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #137d8b: 16 real palettes, including Discover's brand system and The New York Times's brand system, as the supporting colour. Seen in: Discover (https://brandsweets.com/colors/brands/discover-com), The New York Times (https://brandsweets.com/colors/brands/nytimes-com), Capital One (https://brandsweets.com/colors/brands/capitalone-com), Campus (https://brandsweets.com/palettes/friendly#campus). — https://brandsweets.com/colors/denim
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #137d8b: 5 real palettes, including Wendy's's brand system and Honda's brand system, as the supporting colour. Seen in: Wendy's (https://brandsweets.com/colors/brands/wendys-com), Honda (https://brandsweets.com/colors/brands/honda-com), AT&T (https://brandsweets.com/colors/brands/att-com), Newsprint (https://brandsweets.com/palettes/editorial#newsprint). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 4.85:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #0f616c (7.13:1)
- On black (#000000): 4.33:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #148190 (4.57:1); AA: background → #f7f7f7 (4.52:1); AAA: text → #19a5b8 (7.12:1)

## Brands using this color

- **Perplexity** — primary #20808d (Δ 1.137) — https://brandsweets.com/colors/brands/perplexity
- **Redfin** — accent #00828c (Δ 1.486) — https://brandsweets.com/colors/brands/redfin-com

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- 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/137d8b-a2b8be-df4e83-1f262d-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: "#137d8b" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.