# #15c7ef

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

## Values

- Hex: `#15c7ef`
- RGB: rgb(21, 199, 239)
- HSL: hsl(191, 87%, 51%)
- OKLCH: oklch(0.768 0.137 219.6)
- Relative luminance: 0.4724
- Nearest named color: Blue Bikini (#00bbee, Δ 3.431) — https://brandsweets.com/colors/blue-bikini
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/15c7ef

## Tints & shades

- Tints (toward white): #2dcdf0, #40d1f2, #58d7f3, #70ddf5, #88e2f7, #9be7f8, #b3edfa, #cbf2fb, #def7fd, #f5fdfe
- Shades (toward black): #0fb6db, #0ea6c8, #0c92b0, #0b7f99, #096f86, #085b6e, #064756, #04333e, #03242b, #011013

## Harmonies

- Complementary: #ef3d15
- Analogous: #15efaa, #155aef
- Triadic: #ef15c7, #c7ef15
- Split-complementary: #ef155a, #efaa15
- Tetradic: #aa15ef, #ef3d15, #5aef15

## Colors that go with #15c7ef

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 #15c7ef: 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), Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com). — https://brandsweets.com/colors/charcoal
- **Dark Salmon** #e9967a [harmony, pool: complementary] — Dark Salmon sits directly opposite #15c7ef on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Polaroid (https://brandsweets.com/palettes/light#polaroid). — https://brandsweets.com/colors/darksalmon
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #15c7ef: 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] — 7 real palettes, including Kraken's brand system and Confluent's brand system put Midnight Blue beside #15c7ef, 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
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #15c7ef in 6 real palettes, including 1password's brand system and Confluent's brand system, as the accent. Seen in: 1password (https://brandsweets.com/colors/brands/1password-com), Confluent (https://brandsweets.com/colors/brands/confluent-io), Elastic (https://brandsweets.com/colors/brands/elastic-co), Telehealth (https://brandsweets.com/palettes/modern#telehealth). — https://brandsweets.com/colors/royalblue
- **Steel Blue** #4682b4 [pool] — Designers have shipped Steel Blue with #15c7ef: 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 #15c7ef in 10 real palettes, including Astro's brand system and Crayon Box, as the text colour against it. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Cursor (https://brandsweets.com/colors/brands/cursor-com), Boeing (https://brandsweets.com/colors/brands/boeing-com). — https://brandsweets.com/colors/taupe
- **Light Coral** #f08080 [harmony, pool: split] — Light Coral is a split-complement of #15c7ef: 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

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

- On white (#ffffff): 2.01:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0b7f99 (4.66:1); AA: background → #474747 (4.62:1); AAA: text → #085f72 (7.27:1); AAA: background → #2b2b2b (7.04:1)
- On black (#000000): 10.45:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Riot Games** — accent #0bc4e2 (Δ 1.941) — https://brandsweets.com/colors/brands/riotgames-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/15c7ef-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: "#15c7ef" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.