# #4dc9fe

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

## Values

- Hex: `#4dc9fe`
- RGB: rgb(77, 201, 254)
- HSL: hsl(198, 99%, 65%)
- OKLCH: oklch(0.789 0.131 230.2)
- Relative luminance: 0.5051
- Nearest named color: Blue Mana (#68c2f5, Δ 2.401) — https://brandsweets.com/colors/blue-mana
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/4dc9fe

## Tints & shades

- Tints (toward white): #5dcefe, #71d4fe, #80d8fe, #8fddfe, #a4e3ff, #b3e8ff, #c2edff, #d1f1ff, #e6f7ff, #f5fcff
- Shades (toward black): #2fc0fe, #10b7fe, #01a7ef, #0192d0, #017db2, #01648e, #014e70, #003951, #002433, #000e14

## Harmonies

- Complementary: #fe824d
- Analogous: #4dfedb, #4d71fe
- Triadic: #fe4dc9, #c9fe4d
- Split-complementary: #fe4d71, #fedb4d
- Tetradic: #db4dfe, #fe824d, #71fe4d

## Colors that go with #4dc9fe

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 #4dc9fe: softer than #000 and cool enough to feel like part of the same palette. Seen in: Vimeo (https://brandsweets.com/colors/brands/vimeo-com), UEFA (https://brandsweets.com/colors/brands/uefa-com), Boeing (https://brandsweets.com/colors/brands/boeing-com), Coastal (https://brandsweets.com/palettes/cool#coastal). — https://brandsweets.com/colors/charcoal
- **Dark Orange** #ff8c00 [harmony, pool: complementary] — Dark Orange sits directly opposite #4dc9fe on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: PayPal (https://brandsweets.com/colors/brands/paypal-com), Learning App (https://brandsweets.com/palettes/playful#learning-app), Elastic (https://brandsweets.com/colors/brands/elastic-co). — https://brandsweets.com/colors/darkorange
- **Crimson** #dc143c [pool] — Crimson is paired with #4dc9fe in 4 real palettes, including Riot Games's brand system and JBL's brand system, as the supporting colour. Seen in: Riot Games (https://brandsweets.com/colors/brands/riotgames-com), JBL (https://brandsweets.com/colors/brands/jbl-com), Tiffany & Co. (https://brandsweets.com/colors/brands/tiffany-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember). — https://brandsweets.com/colors/crimson
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #4dc9fe: 4 real palettes, including Patreon's brand system and Opensea's brand system, as the accent. Seen in: Patreon (https://brandsweets.com/colors/brands/patreon-com), Opensea (https://brandsweets.com/colors/brands/opensea-io), Figma (https://brandsweets.com/colors/brands/figma), Venmo (https://brandsweets.com/colors/brands/venmo-com). — https://brandsweets.com/colors/dodgerblue
- **Midnight Blue** #191970 [pool] — 6 real palettes, including Telehealth and Kraken's brand system put Midnight Blue beside #4dc9fe, as the text colour against it. Seen in: Telehealth (https://brandsweets.com/palettes/modern#telehealth), 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). — https://brandsweets.com/colors/midnightblue
- **Periwinkle** #ccccff [pool] — Periwinkle shows up next to #4dc9fe 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 #4dc9fe: 4 real palettes, including Calendly's brand system and Audible's brand system, as the accent. Seen in: Calendly (https://brandsweets.com/colors/brands/calendly-com), Audible (https://brandsweets.com/colors/brands/audible-com), First Snow (https://brandsweets.com/palettes/cool#first-snow), Steam (https://brandsweets.com/colors/brands/steampowered-com). — https://brandsweets.com/colors/powderblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #4dc9fe in 7 real palettes, including 1password's brand system and Telehealth, as the accent. Seen in: 1password (https://brandsweets.com/colors/brands/1password-com), Telehealth (https://brandsweets.com/palettes/modern#telehealth), NBA (https://brandsweets.com/colors/brands/nba-com), Webflow (https://brandsweets.com/colors/brands/webflow-com). — https://brandsweets.com/colors/royalblue

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

- On white (#ffffff): 1.89:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #017db2 (4.59:1); AA: background → #4a4a4a (4.68:1); AAA: text → #015d84 (7.24:1); AAA: background → #2e2e2e (7.18:1)
- On black (#000000): 11.1:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Twilio** — primary #3acefa (Δ 1.808) — https://brandsweets.com/colors/brands/twilio-com
- **Twilio** — secondary #3acefa (Δ 1.808) — https://brandsweets.com/colors/brands/twilio-com
- **PayPal** — secondary #65ccfc (Δ 1.965) — https://brandsweets.com/colors/brands/paypal-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/4dc9fe-9cb3c4-df4e69-1f232d-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: "#4dc9fe" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.