# #40c9be

A color — neutral. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#40c9be`
- RGB: rgb(64, 201, 190)
- HSL: hsl(175, 56%, 52%)
- OKLCH: oklch(0.761 0.116 187.3)
- Relative luminance: 0.4658
- Nearest named color: Cockatoo (#58c8b6, Δ 1.594) — https://brandsweets.com/colors/cockatoo
- Moods: neutral
- Page: https://brandsweets.com/colors/40c9be

## Tints & shades

- Tints (toward white): #54cfc5, #64d3ca, #78d9d1, #88ddd6, #9ce3dd, #afe9e4, #bfede9, #d3f3f0, #e3f7f5, #f7fdfc
- Shades (toward black): #35bbb0, #2fa79d, #2b978e, #25837b, #1f6f69, #1a5b56, #144843, #103834, #0a2422, #04100f

## Harmonies

- Complementary: #c9404b
- Analogous: #40c979, #4090c9
- Triadic: #be40c9, #c9be40
- Split-complementary: #c94090, #c97940
- Tetradic: #7940c9, #c9404b, #90c940

## Colors that go with #40c9be

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 #40c9be: softer than #000 and cool enough to feel like part of the same palette. Seen in: Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Docker (https://brandsweets.com/colors/brands/docker-com), UEFA (https://brandsweets.com/colors/brands/uefa-com), Canopy (https://brandsweets.com/palettes/cool#canopy). — https://brandsweets.com/colors/charcoal
- **Blue** #0000ff [pool] — 4 real palettes, including Canva's brand system and Unity's brand system put Blue beside #40c9be, as the accent. Seen in: Canva (https://brandsweets.com/colors/brands/canva-com), Unity (https://brandsweets.com/colors/brands/unity-com), Uber (https://brandsweets.com/colors/brands/uber-com), Warp (https://brandsweets.com/colors/brands/warp-dev). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #40c9be in 5 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), Formula 1 (https://brandsweets.com/colors/brands/formula1-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [harmony, pool: analogous] — Deep Sky Blue is #40c9be's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Snowflake AI Data Cloud (https://brandsweets.com/colors/brands/snowflake-com), Salesforce (https://brandsweets.com/colors/brands/salesforce-com), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/deepskyblue
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #40c9be: 4 real palettes, including Unity's brand system and Patreon's brand system, as the lead colour. Seen in: Unity (https://brandsweets.com/colors/brands/unity-com), Patreon (https://brandsweets.com/colors/brands/patreon-com), Opensea (https://brandsweets.com/colors/brands/opensea-io), Figma (https://brandsweets.com/colors/brands/figma). — https://brandsweets.com/colors/dodgerblue
- **Midnight Blue** #191970 [pool] — 4 real palettes, including Confluent's brand system and Ford's brand system put Midnight Blue beside #40c9be, as the lead colour. Seen in: Confluent (https://brandsweets.com/colors/brands/confluent-io), Ford (https://brandsweets.com/colors/brands/ford-com), First Snow (https://brandsweets.com/palettes/cool#first-snow), Open House (https://brandsweets.com/palettes/clean#open-house). — https://brandsweets.com/colors/midnightblue
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #40c9be in 4 real palettes, including Khan Academy's brand system and Docker's brand system, as the accent. Seen in: Khan Academy (https://brandsweets.com/colors/brands/khanacademy-org), Docker (https://brandsweets.com/colors/brands/docker-com), Brilliant (https://brandsweets.com/colors/brands/brilliant-org), Confluent (https://brandsweets.com/colors/brands/confluent-io). — https://brandsweets.com/colors/royalblue
- **Sandy Brown** #f4a460 [harmony, pool: triadic] — Sandy Brown completes a triad with #40c9be — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Undergrowth (https://brandsweets.com/palettes/dark#undergrowth), Forest Floor (https://brandsweets.com/palettes/dark#forest-floor), Ubereats (https://brandsweets.com/colors/brands/ubereats-com). — https://brandsweets.com/colors/sandybrown

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

- On white (#ffffff): 2.04:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #25837b (4.55:1); AA: background → #474747 (4.56:1); AAA: text → #1c635e (7.01:1); AAA: background → #292929 (7.15:1)
- On black (#000000): 10.32:1 — AA pass, AA-large pass, AAA pass

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/40c9be-a2bdbe-d4599f-1f282d-e9f1ed?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: "#40c9be" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.