# #81f3ef

A color — vivid, light, clean. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#81f3ef`
- RGB: rgb(129, 243, 239)
- HSL: hsl(178, 83%, 73%)
- OKLCH: oklch(0.896 0.105 192.4)
- Relative luminance: 0.75
- Nearest named color: Bath Water (#88eeee, Δ 1.361) — https://brandsweets.com/colors/bath-water
- Moods: vivid, light, clean
- Page: https://brandsweets.com/colors/81f3ef

## Tints & shades

- Tints (toward white): #8ff5f1, #98f5f2, #a6f7f4, #b0f8f5, #bef9f7, #c7faf8, #d5fbfa, #defcfb, #ecfdfd, #f6fefe
- Shades (toward black): #60f0eb, #40ede7, #1feae3, #14d2cc, #11b6b0, #0e9591, #0b7571, #085451, #053332, #021312

## Harmonies

- Complementary: #f38185
- Analogous: #81f3b6, #81bef3
- Triadic: #ef81f3, #f3ef81
- Split-complementary: #f381be, #f3b681
- Tetradic: #b681f3, #f38185, #bef381

## Colors that go with #81f3ef

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 #81f3ef: softer than #000 and cool enough to feel like part of the same palette. Seen in: Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Boeing (https://brandsweets.com/colors/brands/boeing-com), Sweetgreen (https://brandsweets.com/colors/brands/sweetgreen-com), Canopy (https://brandsweets.com/palettes/cool#canopy). — https://brandsweets.com/colors/charcoal
- **Deep Sky Blue** #00bfff [harmony, pool: analogous] — Deep Sky Blue is #81f3ef's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Salesforce (https://brandsweets.com/colors/brands/salesforce-com), Deep Water (https://brandsweets.com/palettes/dark#deep-water), Calendly (https://brandsweets.com/colors/brands/calendly-com). — https://brandsweets.com/colors/deepskyblue
- **Light Coral** #f08080 [harmony, pool: complementary] — Light Coral sits directly opposite #81f3ef 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
- **Slate Gray** #708090 [pool] — 4 real palettes, including Ink Wash and Ledger Dark put Slate Gray beside #81f3ef, as the supporting colour. Seen in: Ink Wash (https://brandsweets.com/palettes/dark#ink-wash), Ledger Dark (https://brandsweets.com/palettes/dark#ledger-dark), Midnight Luxe (https://brandsweets.com/palettes/luxury#midnight-luxe), Dusty Blue (https://brandsweets.com/palettes/cool#dusty-blue). — https://brandsweets.com/colors/slategray
- **Taupe** #483c32 [pool] — Taupe is paired with #81f3ef in 13 real palettes, including Astro's brand system and Mint Chip, as the text colour against it. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Mint Chip (https://brandsweets.com/palettes/light#mint-chip), Macaron (https://brandsweets.com/palettes/light#macaron), Nursery (https://brandsweets.com/palettes/light#nursery). — https://brandsweets.com/colors/taupe
- **Plum** #dda0dd [harmony, pool: split] — Plum is a split-complement of #81f3ef: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Netlify (https://brandsweets.com/colors/brands/netlify-com), Blossom (https://brandsweets.com/palettes/light#blossom). — https://brandsweets.com/colors/plum
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #81f3ef: 3 real palettes, including Coastal and Estate, as the lead colour. Seen in: Coastal (https://brandsweets.com/palettes/cool#coastal), Estate (https://brandsweets.com/palettes/luxury#estate), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/cadetblue
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #81f3ef: 3 real palettes, including Blue Mono and Blueprint, as the supporting colour. Seen in: Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Terminal (https://brandsweets.com/palettes/technical#terminal). — https://brandsweets.com/colors/cornflowerblue

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

- On white (#ffffff): 1.31:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0c837f (4.6:1); AA: background → #636363 (4.58:1); AAA: text → #09625f (7.18:1); AAA: background → #474747 (7.08:1)
- On black (#000000): 16:1 — AA pass, AA-large pass, AAA pass

## Fonts for this mood

- clean: https://brandsweets.com/fonts/mood/clean

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/81f3ef-a2bcbe-d45999-1f282d-e9f1ed?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: "#81f3ef" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.