# #51aeec

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

## Values

- Hex: `#51aeec`
- RGB: rgb(81, 174, 236)
- HSL: hsl(204, 80%, 62%)
- OKLCH: oklch(0.721 0.126 240.9)
- Relative luminance: 0.3808
- Nearest named color: Cerulean (#55aaee, Δ 1.213) — https://brandsweets.com/colors/cerulean
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/51aeec

## Tints & shades

- Tints (toward white): #63b6ee, #71bdef, #83c5f1, #91ccf3, #a3d4f5, #b6ddf7, #c3e3f8, #d6ecfa, #e3f2fc, #f6fbfe
- Shades (toward black): #35a1e9, #1994e6, #1785cf, #1473b3, #116297, #0e507c, #0b3e60, #082f49, #051e2e, #020c12

## Harmonies

- Complementary: #ec8f51
- Analogous: #51ecdc, #5160ec
- Triadic: #ec51ae, #aeec51
- Split-complementary: #ec5160, #ecdc51
- Tetradic: #dc51ec, #ec8f51, #60ec51

## Colors that go with #51aeec

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 #51aeec: softer than #000 and cool enough to feel like part of the same palette. Seen in: Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com), Blizzard (https://brandsweets.com/colors/brands/blizzard-com), Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Lido (https://brandsweets.com/palettes/vivid#lido). — https://brandsweets.com/colors/charcoal
- **Peru** #cd853f [harmony, pool: complementary] — Peru sits directly opposite #51aeec on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Estate (https://brandsweets.com/palettes/luxury#estate). — https://brandsweets.com/colors/peru
- **Amber** #ffbf00 [pool] — Amber is paired with #51aeec in 6 real palettes, including Salesforce's brand system and NBA's brand system, as the accent. Seen in: Salesforce (https://brandsweets.com/colors/brands/salesforce-com), NBA (https://brandsweets.com/colors/brands/nba-com), Blueprint (https://brandsweets.com/palettes/technical#blueprint), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 5 real palettes, including Warp's brand system and Canva's brand system put Blue beside #51aeec, 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), Unity (https://brandsweets.com/colors/brands/unity-com). — https://brandsweets.com/colors/blue
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #51aeec in 4 real palettes, including Learning App and Elastic's brand system, as the accent. Seen in: Learning App (https://brandsweets.com/palettes/playful#learning-app), Elastic (https://brandsweets.com/colors/brands/elastic-co), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com), PayPal (https://brandsweets.com/colors/brands/paypal-com). — https://brandsweets.com/colors/darkorange
- **Denim** #1560bd [pool] — Designers have shipped Denim with #51aeec: 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), Apple (https://brandsweets.com/colors/brands/apple-com), Gopro (https://brandsweets.com/colors/brands/gopro-com). — https://brandsweets.com/colors/denim
- **Medium Sea Green** #3cb371 [pool] — Medium Sea Green is paired with #51aeec in 4 real palettes, including Terminal and Telehealth, as the lead colour. Seen in: Terminal (https://brandsweets.com/palettes/technical#terminal), Telehealth (https://brandsweets.com/palettes/modern#telehealth), Spotify (https://brandsweets.com/colors/brands/spotify), Unity (https://brandsweets.com/colors/brands/unity-com). — https://brandsweets.com/colors/mediumseagreen
- **Midnight Blue** #191970 [pool] — 9 real palettes, including Blue Mono and Kraken's brand system put Midnight Blue beside #51aeec, as the text colour against it. Seen in: Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Kraken (https://brandsweets.com/colors/brands/kraken-com), Confluent (https://brandsweets.com/colors/brands/confluent-io), SoFi (https://brandsweets.com/colors/brands/sofi-com). — https://brandsweets.com/colors/midnightblue

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

- On white (#ffffff): 2.44:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #1579bc (4.67:1); AA: background → #3b3b3b (4.6:1); AAA: text → #105c8e (7.13:1); AAA: background → #1a1a1a (7.14:1)
- On black (#000000): 8.62:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Calm** — primary #3cb0ec (Δ 1.341) — https://brandsweets.com/colors/brands/calm-com
- **Snowflake AI Data Cloud** — accent #45aee3 (Δ 1.67) — https://brandsweets.com/colors/brands/snowflake-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/51aeec-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: "#51aeec" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.