# #4ec9df

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

## Values

- Hex: `#4ec9df`
- RGB: rgb(78, 201, 223)
- HSL: hsl(189, 69%, 59%)
- OKLCH: oklch(0.776 0.111 211.6)
- Relative luminance: 0.4872
- Nearest named color: darkturquoise (#00ced1, Δ 3.746) — https://brandsweets.com/colors/darkturquoise
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/4ec9df

## Tints & shades

- Tints (toward white): #60cee2, #71d3e5, #82d9e8, #93deeb, #a5e3ee, #b1e7f1, #c3edf4, #d4f2f7, #e5f7fa, #f6fcfd
- Shades (toward black): #39c2db, #26b6cf, #22a3b9, #1d8c9f, #19798a, #156270, #114f5a, #0c3941, #08262b, #030f11

## Harmonies

- Complementary: #df644e
- Analogous: #4edfac, #4e81df
- Triadic: #df4ec9, #c9df4e
- Split-complementary: #df4e81, #dfac4e
- Tetradic: #ac4edf, #df644e, #81df4e

## Colors that go with #4ec9df

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 #4ec9df: softer than #000 and cool enough to feel like part of the same palette. Seen in: Vimeo (https://brandsweets.com/colors/brands/vimeo-com), UEFA (https://brandsweets.com/colors/brands/uefa-com), Coastal (https://brandsweets.com/palettes/cool#coastal), Boeing (https://brandsweets.com/colors/brands/boeing-com). — https://brandsweets.com/colors/charcoal
- **Dark Salmon** #e9967a [harmony, pool: complementary] — Dark Salmon sits directly opposite #4ec9df on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Polaroid (https://brandsweets.com/palettes/light#polaroid), Chalkboard (https://brandsweets.com/palettes/dark#chalkboard). — https://brandsweets.com/colors/darksalmon
- **Crimson** #dc143c [pool] — Crimson is paired with #4ec9df in 4 real palettes, including Riot Games's brand system and Tiffany & Co.'s brand system, as the supporting colour. Seen in: Riot Games (https://brandsweets.com/colors/brands/riotgames-com), Tiffany & Co. (https://brandsweets.com/colors/brands/tiffany-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), JBL (https://brandsweets.com/colors/brands/jbl-com). — https://brandsweets.com/colors/crimson
- **Dark Orange** #ff8c00 [harmony, pool: split] — Dark Orange is a split-complement of #4ec9df: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: PayPal (https://brandsweets.com/colors/brands/paypal-com), Learning App (https://brandsweets.com/palettes/playful#learning-app), Elastic (https://brandsweets.com/colors/brands/elastic-co). — https://brandsweets.com/colors/darkorange
- **Denim** #1560bd [pool] — Designers have shipped Denim with #4ec9df: 4 real palettes, including UEFA's brand system and Venmo's brand system, as the accent. Seen in: UEFA (https://brandsweets.com/colors/brands/uefa-com), Venmo (https://brandsweets.com/colors/brands/venmo-com), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-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 #4ec9df: 4 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] — 9 real palettes, including Telehealth and Confluent's brand system put Midnight Blue beside #4ec9df, as the text colour against it. Seen in: Telehealth (https://brandsweets.com/palettes/modern#telehealth), Confluent (https://brandsweets.com/colors/brands/confluent-io), First Snow (https://brandsweets.com/palettes/cool#first-snow), Kraken (https://brandsweets.com/colors/brands/kraken-com). — https://brandsweets.com/colors/midnightblue
- **Periwinkle** #ccccff [pool] — Periwinkle shows up next to #4ec9df in 4 real palettes, including Mistral AI's brand system and Calendly's brand system, as the accent. Seen in: Mistral AI (https://brandsweets.com/colors/brands/mistral-ai), Calendly (https://brandsweets.com/colors/brands/calendly-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Lavender Milk (https://brandsweets.com/palettes/light#lavender-milk). — https://brandsweets.com/colors/periwinkle

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

- On white (#ffffff): 1.95:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #1b8193 (4.56:1); AA: background → #4a4a4a (4.53:1); AAA: text → #145f6c (7.28:1); AAA: background → #2b2b2b (7.24:1)
- On black (#000000): 10.74:1 — AA pass, AA-large pass, AAA pass

## 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/4ec9df-a2b7be-df4e7e-1f252d-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: "#4ec9df" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.