# #57b0ef

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

## Values

- Hex: `#57b0ef`
- RGB: rgb(87, 176, 239)
- HSL: hsl(205, 83%, 64%)
- OKLCH: oklch(0.729 0.125 242.1)
- Relative luminance: 0.3931
- Nearest named color: Cerulean (#55aaee, Δ 1.667) — https://brandsweets.com/colors/cerulean
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/57b0ef

## Tints & shades

- Tints (toward white): #65b6f1, #78bff2, #86c6f4, #98cff5, #a6d5f7, #b4dcf8, #c7e5fa, #d5ebfb, #e8f4fd, #f6fbfe
- Shades (toward black): #3ba3ed, #1f96ea, #1486d7, #1174bb, #0f639f, #0c5183, #0a4067, #072e4b, #041d2f, #020c13

## Harmonies

- Complementary: #ef9757
- Analogous: #57efe3, #5764ef
- Triadic: #ef57b0, #b0ef57
- Split-complementary: #ef5764, #efe357
- Tetradic: #e357ef, #ef9757, #64ef57

## Colors that go with #57b0ef

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 #57b0ef: 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), Mercury (https://brandsweets.com/colors/brands/mercury-com). — https://brandsweets.com/colors/charcoal
- **Dark Orange** #ff8c00 [harmony, pool: complementary] — Dark Orange sits directly opposite #57b0ef on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Learning App (https://brandsweets.com/palettes/playful#learning-app), Elastic (https://brandsweets.com/colors/brands/elastic-co), PayPal (https://brandsweets.com/colors/brands/paypal-com), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com). — https://brandsweets.com/colors/darkorange
- **Amber** #ffbf00 [pool] — Amber is paired with #57b0ef in 5 real palettes, including NBA's brand system and Salesforce's brand system, as the lead colour. Seen in: NBA (https://brandsweets.com/colors/brands/nba-com), Salesforce (https://brandsweets.com/colors/brands/salesforce-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 #57b0ef, 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
- **Denim** #1560bd [pool] — Designers have shipped Denim with #57b0ef: 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
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #57b0ef: 4 real palettes, including Venmo's brand system and Figma's brand system, as the lead colour. Seen in: Venmo (https://brandsweets.com/colors/brands/venmo-com), Figma (https://brandsweets.com/colors/brands/figma), Patreon (https://brandsweets.com/colors/brands/patreon-com), Opensea (https://brandsweets.com/colors/brands/opensea-io). — https://brandsweets.com/colors/dodgerblue
- **Medium Sea Green** #3cb371 [pool] — Medium Sea Green is paired with #57b0ef 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 #57b0ef, 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), First Snow (https://brandsweets.com/palettes/cool#first-snow). — https://brandsweets.com/colors/midnightblue

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

- On white (#ffffff): 2.37:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #127ac4 (4.56:1); AA: background → #3d3d3d (4.58:1); AAA: text → #0d5a91 (7.27:1); AAA: background → #1c1c1c (7.19:1)
- On black (#000000): 8.86:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Midjourney** — secondary #63b3ed (Δ 1.445) — https://brandsweets.com/colors/brands/midjourney-com
- **Calm** — primary #3cb0ec (Δ 1.882) — https://brandsweets.com/colors/brands/calm-com
- **Mistral AI** — primary #54b4fc (Δ 1.948) — https://brandsweets.com/colors/brands/mistral-ai

## 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/57b0ef-9cafc4-df4e58-1f212d-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: "#57b0ef" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.