# #66b5ea

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

## Values

- Hex: `#66b5ea`
- RGB: rgb(102, 181, 234)
- HSL: hsl(204, 76%, 66%)
- OKLCH: oklch(0.744 0.11 239.8)
- Relative luminance: 0.4181
- Nearest named color: Blue Mana (#68c2f5, Δ 3.575) — https://brandsweets.com/colors/blue-mana
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/66b5ea

## Tints & shades

- Tints (toward white): #74bcec, #81c2ee, #93cbf0, #a1d2f2, #aed8f4, #bcdff6, #c9e5f8, #dbeefa, #e9f4fc, #f6fbfe
- Shades (toward black): #4ba9e7, #319ce3, #1d8ad3, #1978b8, #15679d, #125582, #0e4467, #0a2f48, #061d2d, #020c12

## Harmonies

- Complementary: #ea9b66
- Analogous: #66eadd, #6674ea
- Triadic: #ea66b5, #b5ea66
- Split-complementary: #ea6674, #eadd66
- Tetradic: #dd66ea, #ea9b66, #74ea66

## Colors that go with #66b5ea

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 #66b5ea: softer than #000 and cool enough to feel like part of the same palette. Seen in: Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com), Mercury (https://brandsweets.com/colors/brands/mercury-com), Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Blizzard (https://brandsweets.com/colors/brands/blizzard-com). — https://brandsweets.com/colors/charcoal
- **Sandy Brown** #f4a460 [harmony, pool: complementary] — Sandy Brown sits directly opposite #66b5ea on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Webflow (https://brandsweets.com/colors/brands/webflow-com). — https://brandsweets.com/colors/sandybrown
- **Amber** #ffbf00 [pool] — Amber is paired with #66b5ea in 4 real palettes, including Blueprint and NBA's brand system, as the accent. Seen in: Blueprint (https://brandsweets.com/palettes/technical#blueprint), NBA (https://brandsweets.com/colors/brands/nba-com), Salesforce (https://brandsweets.com/colors/brands/salesforce-com), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 4 real palettes, including Warp's brand system and Canva's brand system put Blue beside #66b5ea, as the supporting colour. Seen in: Warp (https://brandsweets.com/colors/brands/warp-dev), Canva (https://brandsweets.com/colors/brands/canva-com), Spotify (https://brandsweets.com/colors/brands/spotify), Uber (https://brandsweets.com/colors/brands/uber-com). — https://brandsweets.com/colors/blue
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #66b5ea in 4 real palettes, including Learning App and PayPal's brand system, as the accent. Seen in: Learning App (https://brandsweets.com/palettes/playful#learning-app), PayPal (https://brandsweets.com/colors/brands/paypal-com), Elastic (https://brandsweets.com/colors/brands/elastic-co), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com). — https://brandsweets.com/colors/darkorange
- **Denim** #1560bd [pool] — Designers have shipped Denim with #66b5ea: 7 real palettes, including Coca-Cola's brand system and Venmo's brand system, as the accent. Seen in: Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Venmo (https://brandsweets.com/colors/brands/venmo-com), Open House (https://brandsweets.com/palettes/clean#open-house), UEFA (https://brandsweets.com/colors/brands/uefa-com). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #66b5ea: 4 real palettes, including Patreon's brand system and Venmo's brand system, as the accent. Seen in: Patreon (https://brandsweets.com/colors/brands/patreon-com), Venmo (https://brandsweets.com/colors/brands/venmo-com), Figma (https://brandsweets.com/colors/brands/figma), Opensea (https://brandsweets.com/colors/brands/opensea-io). — https://brandsweets.com/colors/dodgerblue
- **Midnight Blue** #191970 [pool] — 10 real palettes, including Blue Mono and First Snow put Midnight Blue beside #66b5ea, as the text colour against it. Seen in: Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), First Snow (https://brandsweets.com/palettes/cool#first-snow), Kraken (https://brandsweets.com/colors/brands/kraken-com), Telehealth (https://brandsweets.com/palettes/modern#telehealth). — https://brandsweets.com/colors/midnightblue

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

- On white (#ffffff): 2.24:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #1a7bbc (4.56:1); AA: background → #404040 (4.62:1); AAA: text → #135b8b (7.25:1); AAA: background → #212121 (7.18:1)
- On black (#000000): 9.36:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Midjourney** — secondary #63b3ed (Δ 0.853) — https://brandsweets.com/colors/brands/midjourney-com
- **Max** — secondary #71b8f2 (Δ 1.773) — https://brandsweets.com/colors/brands/max-com
- **Cursor** — accent #65afe0 (Δ 1.945) — https://brandsweets.com/colors/brands/cursor-com

## 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/66b5ea-9cafc4-df4e5a-1f222d-e9f1f0?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: "#66b5ea" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.