# #01cff9

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

## Values

- Hex: `#01cff9`
- RGB: rgb(1, 207, 249)
- HSL: hsl(190, 99%, 49%)
- OKLCH: oklch(0.79 0.143 219.5)
- Relative luminance: 0.5147
- Nearest named color: deepskyblue (#00bfff, Δ 4.782) — https://brandsweets.com/colors/deepskyblue
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/01cff9

## Tints & shades

- Tints (toward white): #16d7fe, #2fdbfe, #48e0fe, #62e4fe, #7be8fe, #8fecfe, #a9f0ff, #c2f5ff, #dbf9ff, #f5fdff
- Shades (toward black): #01bee4, #01a9cb, #0198b7, #01839d, #017289, #015d70, #004c5b, #003742, #00262e, #001114

## Harmonies

- Complementary: #f92a01
- Analogous: #01f9a6, #0154f9
- Triadic: #f901cf, #cff901
- Split-complementary: #f90154, #f9a601
- Tetradic: #a601f9, #f92a01, #54f901

## Colors that go with #01cff9

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 #01cff9: 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
- **Crimson** #dc143c [pool] — Crimson is paired with #01cff9 in 4 real palettes, including Riot Games's brand system and Tiffany & Co.'s brand system, as the supporting colour. Seen in: Riot Games (https://brandsweets.com/colors/brands/riotgames-com), Tiffany & Co. (https://brandsweets.com/colors/brands/tiffany-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), JBL (https://brandsweets.com/colors/brands/jbl-com). — https://brandsweets.com/colors/crimson
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #01cff9: 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), Opensea (https://brandsweets.com/colors/brands/opensea-io), Venmo (https://brandsweets.com/colors/brands/venmo-com). — https://brandsweets.com/colors/dodgerblue
- **Midnight Blue** #191970 [pool] — 4 real palettes, including Telehealth and Kraken's brand system put Midnight Blue beside #01cff9, as the text colour against it. Seen in: Telehealth (https://brandsweets.com/palettes/modern#telehealth), Kraken (https://brandsweets.com/colors/brands/kraken-com), Confluent (https://brandsweets.com/colors/brands/confluent-io), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono). — https://brandsweets.com/colors/midnightblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #01cff9 in 6 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), Elastic (https://brandsweets.com/colors/brands/elastic-co). — https://brandsweets.com/colors/royalblue
- **Steel Blue** #4682b4 [pool] — Designers have shipped Steel Blue with #01cff9: 4 real palettes, including Astro's brand system and Deep Water, as the lead colour. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Deep Water (https://brandsweets.com/palettes/dark#deep-water), Glacier (https://brandsweets.com/palettes/cool#glacier), Telegram (https://brandsweets.com/colors/brands/telegram-org). — https://brandsweets.com/colors/steelblue
- **Taupe** #483c32 [pool] — Taupe is paired with #01cff9 in 9 real palettes, including Astro's brand system and Boeing's brand system, as the text colour against it. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Boeing (https://brandsweets.com/colors/brands/boeing-com), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Cursor (https://brandsweets.com/colors/brands/cursor-com). — https://brandsweets.com/colors/taupe
- **Dark Salmon** #e9967a [harmony: complementary] — Dark Salmon sits directly opposite #01cff9 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/darksalmon

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

- On white (#ffffff): 1.86:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #017f98 (4.68:1); AA: background → #4d4d4d (4.55:1); AAA: text → #016175 (7.08:1); AAA: background → #303030 (7.1:1)
- On black (#000000): 11.29:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Vimeo** — primary #14d3fb (Δ 1.156) — https://brandsweets.com/colors/brands/vimeo-com
- **Twilio** — primary #3acefa (Δ 1.289) — https://brandsweets.com/colors/brands/twilio-com
- **Twilio** — secondary #3acefa (Δ 1.289) — https://brandsweets.com/colors/brands/twilio-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/01cff9-a2b6be-df4e7c-1f252d-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: "#01cff9" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.