# #39c1ef

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

## Values

- Hex: `#39c1ef`
- RGB: rgb(57, 193, 239)
- HSL: hsl(195, 85%, 58%)
- OKLCH: oklch(0.759 0.13 225.7)
- Relative luminance: 0.4524
- Nearest named color: Blue Bikini (#00bbee, Δ 2.399) — https://brandsweets.com/colors/blue-bikini
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/39c1ef

## Tints & shades

- Tints (toward white): #4cc7f0, #5fcdf2, #71d3f4, #84d9f5, #97dff7, #aae5f8, #bdeafa, #d0f0fb, #e3f6fd, #f6fcfe
- Shades (toward black): #21baed, #12abde, #1099c6, #0e83aa, #0c7192, #0a5e7b, #08495e, #063747, #03212a, #020f13

## Harmonies

- Complementary: #ef6639
- Analogous: #39efc1, #3966ef
- Triadic: #ef39c1, #c1ef39
- Split-complementary: #ef3966, #efc139
- Tetradic: #c139ef, #ef6639, #66ef39

## Colors that go with #39c1ef

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 #39c1ef: softer than #000 and cool enough to feel like part of the same palette. Seen in: Vimeo (https://brandsweets.com/colors/brands/vimeo-com), Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com), UEFA (https://brandsweets.com/colors/brands/uefa-com). — https://brandsweets.com/colors/charcoal
- **Denim** #1560bd [pool] — Designers have shipped Denim with #39c1ef: 4 real palettes, including Venmo's brand system and UEFA's brand system, as the accent. Seen in: Venmo (https://brandsweets.com/colors/brands/venmo-com), UEFA (https://brandsweets.com/colors/brands/uefa-com), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Open House (https://brandsweets.com/palettes/clean#open-house). — https://brandsweets.com/colors/denim
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #39c1ef: 4 real palettes, including Patreon's brand system and Figma's brand system, as the accent. Seen in: Patreon (https://brandsweets.com/colors/brands/patreon-com), Figma (https://brandsweets.com/colors/brands/figma), Venmo (https://brandsweets.com/colors/brands/venmo-com), Opensea (https://brandsweets.com/colors/brands/opensea-io). — https://brandsweets.com/colors/dodgerblue
- **Midnight Blue** #191970 [pool] — 9 real palettes, including Kraken's brand system and Confluent's brand system put Midnight Blue beside #39c1ef, as the lead colour. Seen in: Kraken (https://brandsweets.com/colors/brands/kraken-com), Confluent (https://brandsweets.com/colors/brands/confluent-io), Telehealth (https://brandsweets.com/palettes/modern#telehealth), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono). — https://brandsweets.com/colors/midnightblue
- **Periwinkle** #ccccff [pool] — Periwinkle shows up next to #39c1ef in 4 real palettes, including Mistral AI's brand system and Calendly's brand system, as the accent. Seen in: Mistral AI (https://brandsweets.com/colors/brands/mistral-ai), Calendly (https://brandsweets.com/colors/brands/calendly-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Lavender Milk (https://brandsweets.com/palettes/light#lavender-milk). — https://brandsweets.com/colors/periwinkle
- **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #39c1ef: 4 real palettes, including Calendly's brand system and First Snow, as the accent. Seen in: Calendly (https://brandsweets.com/colors/brands/calendly-com), First Snow (https://brandsweets.com/palettes/cool#first-snow), Audible (https://brandsweets.com/colors/brands/audible-com), Crypto.com (https://brandsweets.com/colors/brands/crypto-com). — https://brandsweets.com/colors/powderblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #39c1ef in 7 real palettes, including 1password's brand system and Elastic's brand system, as the accent. Seen in: 1password (https://brandsweets.com/colors/brands/1password-com), Elastic (https://brandsweets.com/colors/brands/elastic-co), NBA (https://brandsweets.com/colors/brands/nba-com), Confluent (https://brandsweets.com/colors/brands/confluent-io). — https://brandsweets.com/colors/royalblue
- **Coral** #ff7f50 [harmony: complementary] — Coral sits directly opposite #39c1ef 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/coral

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

- On white (#ffffff): 2.09:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0d7fa5 (4.57:1); AA: background → #454545 (4.59:1); AAA: text → #0a5e7b (7.24:1); AAA: background → #262626 (7.24:1)
- On black (#000000): 10.05:1 — AA pass, AA-large pass, AAA pass

## Curated palettes containing it

- **Blueprint** (technical, cool, modern, dark) — #38bdf8, #818cf8, #fbbf24, #0f172a, #e2e8f0 — Cyan and indigo on navy is the developer-tool look; amber is the only warm note, so it always reads as 'attention'. — tool: https://brandsweets.com/palettes/new/38bdf8-818cf8-fbbf24-0f172a-e2e8f0 — collection: https://brandsweets.com/palettes/technical

## 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/39c1ef-9cb5c4-df4e70-1f242d-e9f1ef?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: "#39c1ef" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.