# #66d1bf

A color — neutral. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#66d1bf`
- RGB: rgb(102, 209, 191)
- HSL: hsl(170, 54%, 61%)
- OKLCH: oklch(0.792 0.103 181.1)
- Relative luminance: 0.5219
- Nearest named color: Hidden Sea Glass (#6fd1c9, Δ 1.716) — https://brandsweets.com/colors/hidden-sea-glass
- Moods: neutral
- Page: https://brandsweets.com/colors/66d1bf

## Tints & shades

- Tints (toward white): #76d6c6, #81d9cb, #91ded1, #a1e3d8, #b0e8de, #bcebe3, #ccf0ea, #dcf4f0, #e7f8f5, #f7fdfc
- Shades (toward black): #4ecab6, #3bc4ad, #34ad99, #2d9584, #278272, #206a5e, #195249, #123b34, #0c2723, #05100e

## Harmonies

- Complementary: #d16678
- Analogous: #66d18a, #66add1
- Triadic: #bf66d1, #d1bf66
- Split-complementary: #d166ad, #d18a66
- Tetradic: #8a66d1, #d16678, #add166

## Colors that go with #66d1bf

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 #66d1bf: softer than #000 and cool enough to feel like part of the same palette. Seen in: Canopy (https://brandsweets.com/palettes/cool#canopy), Docker (https://brandsweets.com/colors/brands/docker-com), Coastal (https://brandsweets.com/palettes/cool#coastal), UEFA (https://brandsweets.com/colors/brands/uefa-com). — https://brandsweets.com/colors/charcoal
- **Light Coral** #f08080 [harmony, pool: complementary] — Light Coral sits directly opposite #66d1bf 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 Uber's brand system put Blue beside #66d1bf, as the accent. Seen in: Canva (https://brandsweets.com/colors/brands/canva-com), Uber (https://brandsweets.com/colors/brands/uber-com), Unity (https://brandsweets.com/colors/brands/unity-com), Warp (https://brandsweets.com/colors/brands/warp-dev). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #66d1bf in 4 real palettes, including Tiffany & Co.'s brand system and Riot Games's brand system, as the supporting colour. Seen in: Tiffany & Co. (https://brandsweets.com/colors/brands/tiffany-com), Riot Games (https://brandsweets.com/colors/brands/riotgames-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Formula 1 (https://brandsweets.com/colors/brands/formula1-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #66d1bf: 4 real palettes, including Salesforce's brand system and Astro's brand system, as the lead colour. Seen in: Salesforce (https://brandsweets.com/colors/brands/salesforce-com), Astro (https://brandsweets.com/colors/brands/astro-build), Max (https://brandsweets.com/colors/brands/max-com), Prime Video (https://brandsweets.com/colors/brands/primevideo-com). — https://brandsweets.com/colors/deepskyblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #66d1bf in 4 real palettes, including Docker's brand system and Brilliant's brand system, as the supporting colour. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com), Brilliant (https://brandsweets.com/colors/brands/brilliant-org), Khan Academy (https://brandsweets.com/colors/brands/khanacademy-org), Telehealth (https://brandsweets.com/palettes/modern#telehealth). — https://brandsweets.com/colors/royalblue
- **Slate Gray** #708090 [pool] — 9 real palettes, including Ledger Dark and Still Water put Slate Gray beside #66d1bf, as the supporting colour. Seen in: Ledger Dark (https://brandsweets.com/palettes/dark#ledger-dark), Still Water (https://brandsweets.com/palettes/cool#still-water), Dusty Blue (https://brandsweets.com/palettes/cool#dusty-blue), Graphite Mono (https://brandsweets.com/palettes/neutral#graphite-mono). — https://brandsweets.com/colors/slategray
- **Taupe** #483c32 [pool] — Taupe is paired with #66d1bf in 22 real palettes, including Crayon Box and Mint Chip, as the text colour against it. Seen in: Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Mint Chip (https://brandsweets.com/palettes/light#mint-chip), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Still Water (https://brandsweets.com/palettes/cool#still-water). — https://brandsweets.com/colors/taupe

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

- On white (#ffffff): 1.84:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #278272 (4.64:1); AA: background → #4d4d4d (4.6:1); AAA: text → #1d6257 (7.15:1); AAA: background → #303030 (7.19:1)
- On black (#000000): 11.44:1 — AA pass, AA-large pass, AAA pass

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/66d1bf-a2bebd-d459a9-1f292d-e9f1ec?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: "#66d1bf" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.