# #40d5e2

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

## Values

- Hex: `#40d5e2`
- RGB: rgb(64, 213, 226)
- HSL: hsl(185, 74%, 57%)
- OKLCH: oklch(0.802 0.122 203.7)
- Relative luminance: 0.5417
- Nearest named color: mediumturquoise (#48d1cc, Δ 3.006) — https://brandsweets.com/colors/mediumturquoise
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/40d5e2

## Tints & shades

- Tints (toward white): #52d9e5, #64dde8, #75e1ea, #87e5ed, #9de9f0, #afedf3, #c1f1f6, #d3f5f8, #e4f9fb, #f6fdfe
- Shades (toward black): #2ad0df, #1ebecc, #1ba9b6, #1894a0, #15808a, #11676f, #0d5259, #0a3e43, #062528, #031012

## Harmonies

- Complementary: #e24e40
- Analogous: #40e29f, #4084e2
- Triadic: #e240d5, #d5e240
- Split-complementary: #e24084, #e29f40
- Tetradic: #9f40e2, #e24e40, #84e240

## Colors that go with #40d5e2

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 #40d5e2: 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 #40d5e2 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 #40d5e2: 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), Figma (https://brandsweets.com/colors/brands/figma), Bluesky Social (https://brandsweets.com/colors/brands/bsky-app). — https://brandsweets.com/colors/dodgerblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #40d5e2 in 4 real palettes, including Telehealth and 1password's brand system, as the lead colour. Seen in: Telehealth (https://brandsweets.com/palettes/modern#telehealth), 1password (https://brandsweets.com/colors/brands/1password-com), Docker (https://brandsweets.com/colors/brands/docker-com), Confluent (https://brandsweets.com/colors/brands/confluent-io). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #40d5e2 in 13 real palettes, including Crayon Box and Boeing's brand system, as the text colour against it. Seen in: Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Boeing (https://brandsweets.com/colors/brands/boeing-com), Mint Chip (https://brandsweets.com/palettes/light#mint-chip), Macaron (https://brandsweets.com/palettes/light#macaron). — https://brandsweets.com/colors/taupe
- **Wheat** #f5deb3 [pool] — Designers have shipped Wheat with #40d5e2: 4 real palettes, including Oatly's brand system and Mint Chip, as the supporting colour. Seen in: Oatly (https://brandsweets.com/colors/brands/oatly-com), Mint Chip (https://brandsweets.com/palettes/light#mint-chip), Still Water (https://brandsweets.com/palettes/cool#still-water), Resort (https://brandsweets.com/palettes/light#resort). — https://brandsweets.com/colors/wheat
- **Salmon** #fa8072 [harmony: complementary] — Salmon sits directly opposite #40d5e2 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 #40d5e2: 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), Learning App (https://brandsweets.com/palettes/playful#learning-app). — https://brandsweets.com/colors/darkorange

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

- On white (#ffffff): 1.77:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #15808a (4.68:1); AA: background → #4f4f4f (4.62:1); AAA: text → #0f5f66 (7.37:1); AAA: background → #333333 (7.12:1)
- On black (#000000): 11.83:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Prisma** — accent #01d7e4 (Δ 1.431) — https://brandsweets.com/colors/brands/prisma-io

## 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/40d5e2-a2b8be-df4e88-1f262d-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: "#40d5e2" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.