# #39a9ef

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

## Values

- Hex: `#39a9ef`
- RGB: rgb(57, 169, 239)
- HSL: hsl(203, 85%, 58%)
- OKLCH: oklch(0.704 0.142 241)
- Relative luminance: 0.3548
- Nearest named color: Cerulean (#55aaee, Δ 1.914) — https://brandsweets.com/colors/cerulean
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/39a9ef

## Tints & shades

- Tints (toward white): #4cb1f0, #5fb9f2, #71c2f4, #84caf5, #97d2f7, #aadaf8, #bde2fa, #d0ebfb, #e3f3fd, #f6fbfe
- Shades (toward black): #219fed, #1290de, #1080c6, #0e6eaa, #0c5f92, #0a4f7b, #083d5e, #062e47, #031c2a, #020c13

## Harmonies

- Complementary: #ef7f39
- Analogous: #39efda, #394eef
- Triadic: #ef39a9, #a9ef39
- Split-complementary: #ef394e, #efda39
- Tetradic: #da39ef, #ef7f39, #4eef39

## Colors that go with #39a9ef

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 #39a9ef: 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
- **Medium Sea Green** #3cb371 [harmony, pool: triadic] — Medium Sea Green completes a triad with #39a9ef — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. 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
- **Amber** #ffbf00 [pool] — Amber is paired with #39a9ef 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), Heatwave (https://brandsweets.com/palettes/warm#heatwave). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 6 real palettes, including Warp's brand system and Unity's brand system put Blue beside #39a9ef, as the supporting colour. Seen in: Warp (https://brandsweets.com/colors/brands/warp-dev), Unity (https://brandsweets.com/colors/brands/unity-com), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Canva (https://brandsweets.com/colors/brands/canva-com). — https://brandsweets.com/colors/blue
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #39a9ef 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 #39a9ef: 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
- **Midnight Blue** #191970 [pool] — 8 real palettes, including Kraken's brand system and Blue Mono put Midnight Blue beside #39a9ef, as the lead colour. Seen in: Kraken (https://brandsweets.com/colors/brands/kraken-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Confluent (https://brandsweets.com/colors/brands/confluent-io), SoFi (https://brandsweets.com/colors/brands/sofi-com). — https://brandsweets.com/colors/midnightblue
- **Orange Red** #ff4500 [pool] — Orange Red is paired with #39a9ef in 8 real palettes, including Cursor's brand system and Figma's brand system, as the lead colour. Seen in: Cursor (https://brandsweets.com/colors/brands/cursor-com), Figma (https://brandsweets.com/colors/brands/figma), Heatwave (https://brandsweets.com/palettes/warm#heatwave), Google (https://brandsweets.com/colors/brands/google-com). — https://brandsweets.com/colors/orangered

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

- On white (#ffffff): 2.59:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0f7abd (4.63:1); AA: background → #383838 (4.52:1); AAA: text → #0b5c8e (7.15:1); AAA: background → #141414 (7.1:1)
- On black (#000000): 8.1:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Telegram** — primary #2aabee (Δ 0.842) — https://brandsweets.com/colors/brands/telegram-org
- **Remix** — primary #2dacf9 (Δ 1.516) — https://brandsweets.com/colors/brands/remix-run

## 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/39a9ef-9cb0c4-df4e5d-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: "#39a9ef" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.