# #51c4cd

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

## Values

- Hex: `#51c4cd`
- RGB: rgb(81, 196, 205)
- HSL: hsl(184, 55%, 56%)
- OKLCH: oklch(0.759 0.103 202.4)
- Relative luminance: 0.4564
- Nearest named color: darkturquoise (#00ced1, Δ 3.321) — https://brandsweets.com/colors/darkturquoise
- Moods: cool, modern
- Page: https://brandsweets.com/colors/51c4cd

## Tints & shades

- Tints (toward white): #61cad1, #71cfd6, #84d6db, #94dbe0, #a4e0e5, #b4e6e9, #c4ebee, #d7f2f4, #e7f7f8, #f7fcfd
- Shades (toward black): #3dbec7, #35adb6, #2e979e, #28848a, #227177, #1d5e63, #174b4f, #103537, #0a2224, #050f10

## Harmonies

- Complementary: #cd5951
- Analogous: #51cd97, #5187cd
- Triadic: #cd51c4, #c4cd51
- Split-complementary: #cd5187, #cd9751
- Tetradic: #9751cd, #cd5951, #87cd51

## Colors that go with #51c4cd

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 #51c4cd: softer than #000 and cool enough to feel like part of the same palette. Seen in: Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Vimeo (https://brandsweets.com/colors/brands/vimeo-com), UEFA (https://brandsweets.com/colors/brands/uefa-com), Coastal (https://brandsweets.com/palettes/cool#coastal). — https://brandsweets.com/colors/charcoal
- **Light Coral** #f08080 [harmony, pool: complementary] — Light Coral sits directly opposite #51c4cd on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Sentry (https://brandsweets.com/colors/brands/sentry-io). — https://brandsweets.com/colors/lightcoral
- **Blue** #0000ff [pool] — 4 real palettes, including Canva's brand system and Warp's brand system put Blue beside #51c4cd, as the accent. Seen in: Canva (https://brandsweets.com/colors/brands/canva-com), Warp (https://brandsweets.com/colors/brands/warp-dev), Uber (https://brandsweets.com/colors/brands/uber-com), Unity (https://brandsweets.com/colors/brands/unity-com). — https://brandsweets.com/colors/blue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #51c4cd: 4 real palettes, including UEFA's brand system and Coca-Cola's brand system, as the accent. Seen in: UEFA (https://brandsweets.com/colors/brands/uefa-com), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Venmo (https://brandsweets.com/colors/brands/venmo-com), Open House (https://brandsweets.com/palettes/clean#open-house). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #51c4cd: 5 real palettes, including Patreon's brand system and Opensea's brand system, as the accent. Seen in: Patreon (https://brandsweets.com/colors/brands/patreon-com), Opensea (https://brandsweets.com/colors/brands/opensea-io), Figma (https://brandsweets.com/colors/brands/figma), Venmo (https://brandsweets.com/colors/brands/venmo-com). — https://brandsweets.com/colors/dodgerblue
- **Midnight Blue** #191970 [pool] — 7 real palettes, including Confluent's brand system and First Snow put Midnight Blue beside #51c4cd, as the lead colour. Seen in: Confluent (https://brandsweets.com/colors/brands/confluent-io), First Snow (https://brandsweets.com/palettes/cool#first-snow), Open House (https://brandsweets.com/palettes/clean#open-house), Telehealth (https://brandsweets.com/palettes/modern#telehealth). — https://brandsweets.com/colors/midnightblue
- **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #51c4cd: 5 real palettes, including First Snow and Crypto.com's brand system, as the accent. Seen in: First Snow (https://brandsweets.com/palettes/cool#first-snow), Crypto.com (https://brandsweets.com/colors/brands/crypto-com), Calendly (https://brandsweets.com/colors/brands/calendly-com), Audible (https://brandsweets.com/colors/brands/audible-com). — https://brandsweets.com/colors/powderblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #51c4cd in 8 real palettes, including Confluent's brand system and Brilliant's brand system, as the supporting colour. Seen in: Confluent (https://brandsweets.com/colors/brands/confluent-io), Brilliant (https://brandsweets.com/colors/brands/brilliant-org), Khan Academy (https://brandsweets.com/colors/brands/khanacademy-org), 1password (https://brandsweets.com/colors/brands/1password-com). — https://brandsweets.com/colors/royalblue

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

- On white (#ffffff): 2.07:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #278086 (4.65:1); AA: background → #454545 (4.62:1); AAA: text → #1e6267 (7:1); AAA: background → #292929 (7.02:1)
- On black (#000000): 10.13:1 — AA pass, AA-large pass, AAA pass

## Fonts for this mood

- 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/51c4cd-a2b9be-df4e8a-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: "#51c4cd" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.