# #3fd4d9

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

## Values

- Hex: `#3fd4d9`
- RGB: rgb(63, 212, 217)
- HSL: hsl(182, 67%, 55%)
- OKLCH: oklch(0.796 0.121 198.3)
- Relative luminance: 0.5315
- Nearest named color: mediumturquoise (#48d1cc, Δ 1.77) — https://brandsweets.com/colors/mediumturquoise
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/3fd4d9

## Tints & shades

- Tints (toward white): #50d8dc, #66dde1, #77e0e4, #88e4e7, #9de9ec, #aeedef, #bff1f2, #d0f4f6, #e5f9fa, #f6fdfd
- Shades (toward black): #2acfd5, #26bbc0, #22a6aa, #1d9195, #197c80, #146366, #104f51, #0c3a3c, #082526, #031111

## Harmonies

- Complementary: #d9443f
- Analogous: #3fd991, #3f87d9
- Triadic: #d93fd4, #d4d93f
- Split-complementary: #d93f87, #d9913f
- Tetradic: #913fd9, #d9443f, #87d93f

## Colors that go with #3fd4d9

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 #3fd4d9: softer than #000 and cool enough to feel like part of the same palette. Seen in: UEFA (https://brandsweets.com/colors/brands/uefa-com), Vimeo (https://brandsweets.com/colors/brands/vimeo-com), Boeing (https://brandsweets.com/colors/brands/boeing-com), Coastal (https://brandsweets.com/palettes/cool#coastal). — https://brandsweets.com/colors/charcoal
- **Light Coral** #f08080 [harmony, pool: complementary] — Light Coral sits directly opposite #3fd4d9 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
- **Crimson** #dc143c [pool] — Crimson is paired with #3fd4d9 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
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #3fd4d9: 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), Bluesky Social (https://brandsweets.com/colors/brands/bsky-app). — https://brandsweets.com/colors/dodgerblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #3fd4d9 in 6 real palettes, including Docker's brand system and Telehealth, as the supporting colour. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com), Telehealth (https://brandsweets.com/palettes/modern#telehealth), 1password (https://brandsweets.com/colors/brands/1password-com), Khan Academy (https://brandsweets.com/colors/brands/khanacademy-org). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #3fd4d9 in 14 real palettes, including Crayon Box and Boeing's brand system, as the text colour against it. Seen in: Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Boeing (https://brandsweets.com/colors/brands/boeing-com), Mint Chip (https://brandsweets.com/palettes/light#mint-chip), Raycast (https://brandsweets.com/colors/brands/raycast). — https://brandsweets.com/colors/taupe
- **Wheat** #f5deb3 [pool] — Designers have shipped Wheat with #3fd4d9: 4 real palettes, including Mint Chip and Oatly's brand system, as the accent. Seen in: Mint Chip (https://brandsweets.com/palettes/light#mint-chip), Oatly (https://brandsweets.com/colors/brands/oatly-com), Still Water (https://brandsweets.com/palettes/cool#still-water), Resort (https://brandsweets.com/palettes/light#resort). — https://brandsweets.com/colors/wheat
- **Blue** #0000ff [pool] — 3 real palettes, including Canva's brand system and Uber's brand system put Blue beside #3fd4d9, as the accent. Seen in: Canva (https://brandsweets.com/colors/brands/canva-com), Uber (https://brandsweets.com/colors/brands/uber-com), Warp (https://brandsweets.com/colors/brands/warp-dev). — https://brandsweets.com/colors/blue

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

- On white (#ffffff): 1.81:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #1a8084 (4.7:1); AA: background → #4f4f4f (4.54:1); AAA: text → #135f62 (7.39:1); AAA: background → #303030 (7.31:1)
- On black (#000000): 11.63:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Prisma** — accent #01d7e4 (Δ 1.825) — https://brandsweets.com/colors/brands/prisma-io

## 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/3fd4d9-a2babe-d45990-1f272d-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: "#3fd4d9" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.