# #81dce4

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

## Values

- Hex: `#81dce4`
- RGB: rgb(129, 220, 228)
- HSL: hsl(185, 65%, 70%)
- OKLCH: oklch(0.841 0.088 202.9)
- Relative luminance: 0.6145
- Nearest named color: Cold Blue (#88dddd, Δ 1.235) — https://brandsweets.com/colors/cold-blue
- Moods: cool, vivid, light, technical, modern, clean
- Page: https://brandsweets.com/colors/81dce4

## Tints & shades

- Tints (toward white): #8ddfe7, #9ae3ea, #a2e5eb, #afe9ee, #bcecf1, #c8f0f3, #d5f3f6, #ddf6f8, #eaf9fb, #f7fdfd
- Shades (toward black): #63d4de, #4acdd9, #2dc5d2, #27adb9, #21919c, #1b767e, #155e65, #0f4348, #0a2b2e, #041011

## Harmonies

- Complementary: #e48981
- Analogous: #81e4bb, #81aae4
- Triadic: #e481dc, #dce481
- Split-complementary: #e481aa, #e4bb81
- Tetradic: #bb81e4, #e48981, #aae481

## Colors that go with #81dce4

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 #81dce4: 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), Coastal (https://brandsweets.com/palettes/cool#coastal), UEFA (https://brandsweets.com/colors/brands/uefa-com). — https://brandsweets.com/colors/charcoal
- **Deep Sky Blue** #00bfff [harmony, pool: analogous] — Deep Sky Blue is #81dce4's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Salesforce (https://brandsweets.com/colors/brands/salesforce-com), Mistral AI (https://brandsweets.com/colors/brands/mistral-ai), Calendly (https://brandsweets.com/colors/brands/calendly-com), Max (https://brandsweets.com/colors/brands/max-com). — https://brandsweets.com/colors/deepskyblue
- **Dark Salmon** #e9967a [harmony, pool: complementary] — Dark Salmon sits directly opposite #81dce4 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 #81dce4 in 4 real palettes, including Tiffany & Co.'s brand system and Frost & Ember, as the supporting colour. Seen in: Tiffany & Co. (https://brandsweets.com/colors/brands/tiffany-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Formula 1 (https://brandsweets.com/colors/brands/formula1-com), Riot Games (https://brandsweets.com/colors/brands/riotgames-com). — https://brandsweets.com/colors/crimson
- **Midnight Blue** #191970 [pool] — 5 real palettes, including First Snow and Blue Mono put Midnight Blue beside #81dce4, as the text colour against it. Seen in: First Snow (https://brandsweets.com/palettes/cool#first-snow), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Telehealth (https://brandsweets.com/palettes/modern#telehealth), Allbirds (https://brandsweets.com/colors/brands/allbirds-com). — https://brandsweets.com/colors/midnightblue
- **Plum** #dda0dd [harmony, pool: triadic] — Plum completes a triad with #81dce4 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Netlify (https://brandsweets.com/colors/brands/netlify-com), Blossom (https://brandsweets.com/palettes/light#blossom), Mercury (https://brandsweets.com/colors/brands/mercury-com). — https://brandsweets.com/colors/plum
- **Slate Gray** #708090 [pool] — 7 real palettes, including Still Water and Dusty Blue put Slate Gray beside #81dce4, as the lead colour. Seen in: 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), Ink Wash (https://brandsweets.com/palettes/dark#ink-wash). — https://brandsweets.com/colors/slategray
- **Taupe** #483c32 [pool] — Taupe is paired with #81dce4 in 21 real palettes, including Boeing's brand system and Mint Chip, as the text colour against it. Seen in: Boeing (https://brandsweets.com/colors/brands/boeing-com), 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

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

- On white (#ffffff): 1.58:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #1d828b (4.55:1); AA: background → #575757 (4.57:1); AAA: text → #166269 (7.03:1); AAA: background → #3b3b3b (7.09:1)
- On black (#000000): 13.29:1 — 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
- 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/81dce4-a2b8be-df4e88-1f262d-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: "#81dce4" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.