# #39acf9

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

## Values

- Hex: `#39acf9`
- RGB: rgb(57, 172, 249)
- HSL: hsl(204, 94%, 60%)
- OKLCH: oklch(0.716 0.151 242.9)
- Relative luminance: 0.3721
- Nearest named color: Cerulean (#55aaee, Δ 2.193) — https://brandsweets.com/colors/cerulean
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/39acf9

## Tints & shades

- Tints (toward white): #4db4f9, #61bdfa, #70c3fb, #83cbfb, #97d4fc, #abdcfc, #bfe4fd, #ceeafd, #e1f3fe, #f5fbff
- Shades (toward black): #1ba0f8, #0794f2, #0782d5, #0673bc, #05619e, #044f81, #034068, #022d4a, #021e31, #010c14

## Harmonies

- Complementary: #f98639
- Analogous: #39f9e6, #394cf9
- Triadic: #f939ac, #acf939
- Split-complementary: #f9394c, #f9e639
- Tetradic: #e639f9, #f98639, #4cf939

## Colors that go with #39acf9

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 #39acf9: softer than #000 and cool enough to feel like part of the same palette. Seen in: Blizzard (https://brandsweets.com/colors/brands/blizzard-com), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com), Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Lido (https://brandsweets.com/palettes/vivid#lido). — https://brandsweets.com/colors/charcoal
- **Amber** #ffbf00 [pool] — Amber is paired with #39acf9 in 7 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] — 6 real palettes, including Warp's brand system and Unity's brand system put Blue beside #39acf9, as the supporting colour. Seen in: Warp (https://brandsweets.com/colors/brands/warp-dev), Unity (https://brandsweets.com/colors/brands/unity-com), Canva (https://brandsweets.com/colors/brands/canva-com), Spotify (https://brandsweets.com/colors/brands/spotify). — https://brandsweets.com/colors/blue
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #39acf9 in 5 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 #39acf9: 7 real palettes, including Venmo's brand system and Coca-Cola's brand system, as the accent. Seen in: Venmo (https://brandsweets.com/colors/brands/venmo-com), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Apple (https://brandsweets.com/colors/brands/apple-com), Gopro (https://brandsweets.com/colors/brands/gopro-com). — https://brandsweets.com/colors/denim
- **Gold** #ffd700 [pool] — Gold shows up next to #39acf9 in 4 real palettes, including Miro's brand system and Prime Video's brand system, as the lead colour. Seen in: Miro (https://brandsweets.com/colors/brands/miro-com), Prime Video (https://brandsweets.com/colors/brands/primevideo-com), Star Wars (https://brandsweets.com/colors/brands/starwars-com), Phantom: The money app that'll take you placesLogo PhantomLogo PhantomLogo Phantom (https://brandsweets.com/colors/brands/phantom-com). — https://brandsweets.com/colors/gold
- **Medium Sea Green** #3cb371 [pool] — Medium Sea Green is paired with #39acf9 in 4 real palettes, including Terminal and Unity's brand system, as the lead colour. Seen in: Terminal (https://brandsweets.com/palettes/technical#terminal), Unity (https://brandsweets.com/colors/brands/unity-com), Spotify (https://brandsweets.com/colors/brands/spotify), Telehealth (https://brandsweets.com/palettes/modern#telehealth). — https://brandsweets.com/colors/mediumseagreen
- **Peru** #cd853f [harmony: complementary] — Peru sits directly opposite #39acf9 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/peru

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

- On white (#ffffff): 2.49:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0679c6 (4.61:1); AA: background → #3b3b3b (4.5:1); AAA: text → #055b94 (7.17:1); AAA: background → #171717 (7.21:1)
- On black (#000000): 8.44:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Remix** — primary #2dacf9 (Δ 0.552) — https://brandsweets.com/colors/brands/remix-run
- **Render** — secondary #33acff (Δ 0.907) — https://brandsweets.com/colors/brands/render-com
- **Blizzard** — primary #38a8ff (Δ 1.556) — https://brandsweets.com/colors/brands/blizzard-com
- **Kraken** — accent #00adfe (Δ 1.575) — https://brandsweets.com/colors/brands/kraken-com
- **Telegram** — primary #2aabee (Δ 1.852) — https://brandsweets.com/colors/brands/telegram-org

## Curated palettes containing it

- **Learning App** (playful, vivid, friendly) — #58cc02, #1cb0f6, #ff9600, #ffffff, #1c1c1c — Green, blue and orange at full saturation: the gamified-learning look, where every color is a reward. — tool: https://brandsweets.com/palettes/new/58cc02-1cb0f6-ff9600-ffffff-1c1c1c — collection: https://brandsweets.com/palettes/playful

## 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/39acf9-9cafc4-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: "#39acf9" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.