# #21ccf2

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

## Values

- Hex: `#21ccf2`
- RGB: rgb(33, 204, 242)
- HSL: hsl(191, 89%, 54%)
- OKLCH: oklch(0.782 0.136 218.4)
- Relative luminance: 0.4992
- Nearest named color: Blue Mana (#68c2f5, Δ 4.378) — https://brandsweets.com/colors/blue-mana
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/21ccf2

## Tints & shades

- Tints (toward white): #35d0f3, #4dd6f5, #60daf6, #78e0f7, #8be4f8, #9fe9f9, #b7eefb, #caf3fc, #e2f8fd, #f5fdfe
- Shades (toward black): #0ec3ec, #0cafd4, #0b9cbc, #0a88a4, #08748c, #076074, #054c5c, #043843, #03242b, #011013

## Harmonies

- Complementary: #f24821
- Analogous: #21f2b0, #2163f2
- Triadic: #f221cc, #ccf221
- Split-complementary: #f22163, #f2b021
- Tetradic: #b021f2, #f24821, #63f221

## Colors that go with #21ccf2

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 #21ccf2: 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), Lagoon (https://brandsweets.com/palettes/vivid#lagoon). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [pool] — Crimson is paired with #21ccf2 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), JBL (https://brandsweets.com/colors/brands/jbl-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 #21ccf2: 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] — 5 real palettes, including Telehealth and Kraken's brand system put Midnight Blue beside #21ccf2, 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 #21ccf2 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), Confluent (https://brandsweets.com/colors/brands/confluent-io), Elastic (https://brandsweets.com/colors/brands/elastic-co). — https://brandsweets.com/colors/royalblue
- **Steel Blue** #4682b4 [pool] — Designers have shipped Steel Blue with #21ccf2: 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), Telegram (https://brandsweets.com/colors/brands/telegram-org), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/steelblue
- **Taupe** #483c32 [pool] — Taupe is paired with #21ccf2 in 10 real palettes, including Crayon Box and Astro's brand system, as the text colour against it. Seen in: Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Astro (https://brandsweets.com/colors/brands/astro-build), Boeing (https://brandsweets.com/colors/brands/boeing-com), Cursor (https://brandsweets.com/colors/brands/cursor-com). — https://brandsweets.com/colors/taupe
- **Salmon** #fa8072 [harmony: complementary] — Salmon sits directly opposite #21ccf2 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/salmon

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

- On white (#ffffff): 1.91:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #09809a (4.6:1); AA: background → #4a4a4a (4.64:1); AAA: text → #076074 (7.16:1); AAA: background → #2e2e2e (7.1:1)
- On black (#000000): 10.98:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Twilio** — primary #3acefa (Δ 1.594) — https://brandsweets.com/colors/brands/twilio-com
- **Twilio** — secondary #3acefa (Δ 1.594) — 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/21ccf2-a2b6be-df4e7a-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: "#21ccf2" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.