# #66f7ff

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

## Values

- Hex: `#66f7ff`
- RGB: rgb(102, 247, 255)
- HSL: hsl(183, 100%, 70%)
- OKLCH: oklch(0.901 0.124 200.3)
- Relative luminance: 0.7657
- Nearest named color: Aggressive Aqua (#00fbff, Δ 3.039) — https://brandsweets.com/colors/aggressive-aqua
- Moods: cool, vivid, light, technical, modern, clean
- Page: https://brandsweets.com/colors/66f7ff

## Tints & shades

- Tints (toward white): #75f8ff, #85f9ff, #8ff9ff, #9efaff, #adfbff, #bdfcff, #ccfcff, #d6fdff, #e5feff, #f5feff
- Shades (toward black): #42f6ff, #24f4ff, #00f2ff, #00d5e0, #00b3bd, #009199, #00747a, #005257, #003538, #001314

## Harmonies

- Complementary: #ff6e66
- Analogous: #66ffba, #66abff
- Triadic: #ff66f7, #f7ff66
- Split-complementary: #ff66ab, #ffba66
- Tetradic: #ba66ff, #ff6e66, #abff66

## Colors that go with #66f7ff

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 #66f7ff: 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), UEFA (https://brandsweets.com/colors/brands/uefa-com), Vimeo (https://brandsweets.com/colors/brands/vimeo-com). — https://brandsweets.com/colors/charcoal
- **Deep Sky Blue** #00bfff [harmony, pool: analogous] — Deep Sky Blue is #66f7ff'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), Astro (https://brandsweets.com/colors/brands/astro-build), Deep Water (https://brandsweets.com/palettes/dark#deep-water), Calendly (https://brandsweets.com/colors/brands/calendly-com). — https://brandsweets.com/colors/deepskyblue
- **Taupe** #483c32 [pool] — Taupe is paired with #66f7ff in 9 real palettes, including Astro's brand system and Macaron, as the text colour against it. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Macaron (https://brandsweets.com/palettes/light#macaron), Nursery (https://brandsweets.com/palettes/light#nursery), Boeing (https://brandsweets.com/colors/brands/boeing-com). — https://brandsweets.com/colors/taupe
- **Light Coral** #f08080 [harmony: complementary] — Light Coral sits directly opposite #66f7ff on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/lightcoral
- **Dark Orange** #ff8c00 [harmony, pool: split] — Dark Orange is a split-complement of #66f7ff: 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). — https://brandsweets.com/colors/darkorange
- **Crimson** #dc143c [pool] — Crimson is paired with #66f7ff in 3 real palettes, including Formula 1's brand system and Frost & Ember, as the supporting colour. Seen in: Formula 1 (https://brandsweets.com/colors/brands/formula1-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Tiffany & Co. (https://brandsweets.com/colors/brands/tiffany-com). — https://brandsweets.com/colors/crimson
- **Light Pink** #ffb6c1 [pool] — Light Pink shows up next to #66f7ff in 3 real palettes, including Macaron and Sorbet, as the lead colour. Seen in: Macaron (https://brandsweets.com/palettes/light#macaron), Sorbet (https://brandsweets.com/palettes/light#sorbet), Pastel Pop (https://brandsweets.com/palettes/playful#pastel-pop). — https://brandsweets.com/colors/lightpink
- **Steel Blue** #4682b4 [pool] — Designers have shipped Steel Blue with #66f7ff: 3 real palettes, including Glacier and Astro's brand system, as the lead colour. Seen in: Glacier (https://brandsweets.com/palettes/cool#glacier), Astro (https://brandsweets.com/colors/brands/astro-build), Deep Water (https://brandsweets.com/palettes/dark#deep-water). — https://brandsweets.com/colors/steelblue

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

- On white (#ffffff): 1.29:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #00838a (4.55:1); AA: background → #636363 (4.67:1); AAA: text → #006166 (7.24:1); AAA: background → #474747 (7.22:1)
- On black (#000000): 16.31:1 — 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/66f7ff-a2b9be-d4598e-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: "#66f7ff" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.