# #21ded8

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

## Values

- Hex: `#21ded8`
- RGB: rgb(33, 222, 216)
- HSL: hsl(178, 74%, 50%)
- OKLCH: oklch(0.815 0.136 191.3)
- Relative luminance: 0.5752
- Nearest named color: turquoise (#40e0d0, Δ 1.683) — https://brandsweets.com/colors/turquoise
- Moods: vivid
- Page: https://brandsweets.com/colors/21ded8

## Tints & shades

- Tints (toward white): #37e1dc, #4ee4df, #5fe7e3, #75eae7, #8ceeea, #a2f1ee, #b8f4f2, #caf7f6, #e0faf9, #f6fefd
- Shades (toward black): #1ec8c2, #1bb6b1, #18a09b, #158e8a, #127874, #0f625f, #0c504e, #093a38, #062827, #031211

## Harmonies

- Complementary: #de2127
- Analogous: #21de79, #2186de
- Triadic: #d821de, #ded821
- Split-complementary: #de2186, #de7921
- Tetradic: #7921de, #de2127, #86de21

## Colors that go with #21ded8

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 #21ded8: 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), Canopy (https://brandsweets.com/palettes/cool#canopy), Boeing (https://brandsweets.com/colors/brands/boeing-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [pool] — Crimson is paired with #21ded8 in 4 real palettes, including Tiffany & Co.'s brand system and Formula 1's brand system, as the supporting colour. Seen in: Tiffany & Co. (https://brandsweets.com/colors/brands/tiffany-com), Formula 1 (https://brandsweets.com/colors/brands/formula1-com), Riot Games (https://brandsweets.com/colors/brands/riotgames-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [harmony, pool: analogous] — Deep Sky Blue is #21ded8's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Salesforce (https://brandsweets.com/colors/brands/salesforce-com), Prime Video (https://brandsweets.com/colors/brands/primevideo-com). — https://brandsweets.com/colors/deepskyblue
- **Taupe** #483c32 [pool] — Taupe is paired with #21ded8 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), Mint Chip (https://brandsweets.com/palettes/light#mint-chip), Boeing (https://brandsweets.com/colors/brands/boeing-com). — https://brandsweets.com/colors/taupe
- **Light Coral** #f08080 [harmony: complementary] — Light Coral sits directly opposite #21ded8 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/lightcoral
- **Blue** #0000ff [pool] — 3 real palettes, including Canva's brand system and Uber's brand system put Blue beside #21ded8, as the accent. Seen in: Canva (https://brandsweets.com/colors/brands/canva-com), Uber (https://brandsweets.com/colors/brands/uber-com), Warp (https://brandsweets.com/colors/brands/warp-dev). — https://brandsweets.com/colors/blue
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #21ded8: 3 real palettes, including Bluesky Social's brand system and Patreon's brand system, as the lead colour. Seen in: Bluesky Social (https://brandsweets.com/colors/brands/bsky-app), Patreon (https://brandsweets.com/colors/brands/patreon-com), Opensea (https://brandsweets.com/colors/brands/opensea-io). — https://brandsweets.com/colors/dodgerblue
- **Khaki** #f0e68c [pool] — 3 real palettes, including Pastel Pop and Nursery put Khaki beside #21ded8, as the accent. Seen in: Pastel Pop (https://brandsweets.com/palettes/playful#pastel-pop), Nursery (https://brandsweets.com/palettes/light#nursery), Lagoon (https://brandsweets.com/palettes/vivid#lagoon). — https://brandsweets.com/colors/khaki

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

- On white (#ffffff): 1.68:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #13817d (4.7:1); AA: background → #545454 (4.51:1); AAA: text → #0f625f (7.16:1); AAA: background → #363636 (7.2:1)
- On black (#000000): 12.5:1 — 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/21ded8-a2bcbe-d45999-1f282d-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: "#21ded8" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.