# #18ddf7

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

## Values

- Hex: `#18ddf7`
- RGB: rgb(24, 221, 247)
- HSL: hsl(187, 93%, 53%)
- OKLCH: oklch(0.823 0.14 210)
- Relative luminance: 0.5862
- Nearest named color: Aqua (#0ff0fe, Δ 5.109) — https://brandsweets.com/colors/aqua-2
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/18ddf7

## Tints & shades

- Tints (toward white): #30e0f8, #44e3f8, #5de7f9, #70eafa, #89edfb, #9df0fb, #b5f4fc, #c9f7fd, #e1fbfe, #f5feff
- Shades (toward black): #09d2ec, #08bcd4, #07a6bb, #0690a2, #057f8f, #046976, #03535e, #023d45, #02272c, #011114

## Harmonies

- Complementary: #f73218
- Analogous: #18f7a1, #186df7
- Triadic: #f718dd, #ddf718
- Split-complementary: #f7186d, #f7a118
- Tetradic: #a118f7, #f73218, #6df718

## Colors that go with #18ddf7

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 #18ddf7: softer than #000 and cool enough to feel like part of the same palette. Seen in: UEFA (https://brandsweets.com/colors/brands/uefa-com), Vimeo (https://brandsweets.com/colors/brands/vimeo-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 #18ddf7 in 4 real palettes, including Tiffany & Co.'s brand system and Riot Games's brand system, as the supporting colour. Seen in: Tiffany & Co. (https://brandsweets.com/colors/brands/tiffany-com), Riot Games (https://brandsweets.com/colors/brands/riotgames-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Formula 1 (https://brandsweets.com/colors/brands/formula1-com). — https://brandsweets.com/colors/crimson
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #18ddf7: 5 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), Bluesky Social (https://brandsweets.com/colors/brands/bsky-app), Figma (https://brandsweets.com/colors/brands/figma). — https://brandsweets.com/colors/dodgerblue
- **Taupe** #483c32 [pool] — Taupe is paired with #18ddf7 in 8 real palettes, including Boeing's brand system and Crayon Box, as the text colour against it. Seen in: Boeing (https://brandsweets.com/colors/brands/boeing-com), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Mint Chip (https://brandsweets.com/palettes/light#mint-chip), Macaron (https://brandsweets.com/palettes/light#macaron). — https://brandsweets.com/colors/taupe
- **Salmon** #fa8072 [harmony: complementary] — Salmon sits directly opposite #18ddf7 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
- **Dark Orange** #ff8c00 [harmony, pool: split] — Dark Orange is a split-complement of #18ddf7: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: PayPal (https://brandsweets.com/colors/brands/paypal-com). — https://brandsweets.com/colors/darkorange
- **Light Coral** #f08080 [harmony, pool: split] — Light Coral is a split-complement of #18ddf7: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Sentry (https://brandsweets.com/colors/brands/sentry-io). — https://brandsweets.com/colors/lightcoral
- **Blue** #0000ff [pool] — 3 real palettes, including Warp's brand system and Canva's brand system put Blue beside #18ddf7, as the supporting colour. Seen in: Warp (https://brandsweets.com/colors/brands/warp-dev), Canva (https://brandsweets.com/colors/brands/canva-com), Uber (https://brandsweets.com/colors/brands/uber-com). — https://brandsweets.com/colors/blue

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

- On white (#ffffff): 1.65:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #057f8f (4.73:1); AA: background → #545454 (4.59:1); AAA: text → #04606c (7.25:1); AAA: background → #383838 (7.1:1)
- On black (#000000): 12.72:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **UEFA** — primary #00d9f7 (Δ 1.208) — https://brandsweets.com/colors/brands/uefa-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/18ddf7-a2b8be-df4e83-1f262d-e9f1ee?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: "#18ddf7" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.