# #21caa2

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

## Values

- Hex: `#21caa2`
- RGB: rgb(33, 202, 162)
- HSL: hsl(166, 72%, 46%)
- OKLCH: oklch(0.75 0.141 171.1)
- Relative luminance: 0.4517
- Nearest named color: mediumaquamarine (#66cdaa, Δ 4.163) — https://brandsweets.com/colors/mediumaquamarine
- Moods: vivid
- Page: https://brandsweets.com/colors/21caa2

## Tints & shades

- Tints (toward white): #28dcb2, #3ee0ba, #58e4c3, #6ee7cb, #84ebd3, #9aefdb, #b0f2e3, #caf6ec, #e0faf4, #f6fefc
- Shades (toward black): #1eb894, #1ba786, #189174, #157f66, #126e58, #0f5c4a, #0c4b3c, #09352a, #06231c, #03120e

## Harmonies

- Complementary: #ca2148
- Analogous: #21ca4e, #219dca
- Triadic: #a221ca, #caa221
- Split-complementary: #ca219d, #ca4e21
- Tetradic: #4e21ca, #ca2148, #9dca21

## Colors that go with #21caa2

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 #21caa2: softer than #000 and cool enough to feel like part of the same palette. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com), Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Mint Modern (https://brandsweets.com/palettes/modern#mint-modern), N26 (https://brandsweets.com/colors/brands/n26-com). — https://brandsweets.com/colors/charcoal
- **Hot Pink** #ff69b4 [harmony, pool: complementary] — Hot Pink sits directly opposite #21caa2 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Terminal (https://brandsweets.com/palettes/technical#terminal). — https://brandsweets.com/colors/hotpink
- **Blue** #0000ff [pool] — 4 real palettes, including Unity's brand system and Canva's brand system put Blue beside #21caa2, as the supporting colour. Seen in: Unity (https://brandsweets.com/colors/brands/unity-com), Canva (https://brandsweets.com/colors/brands/canva-com), Spotify (https://brandsweets.com/colors/brands/spotify), Minecraft (https://brandsweets.com/colors/brands/minecraft-net). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #21caa2 in 4 real palettes, including DuckDuckGo's brand system and Tiffany & Co.'s brand system, as the supporting colour. Seen in: DuckDuckGo (https://brandsweets.com/colors/brands/duckduckgo-com), Tiffany & Co. (https://brandsweets.com/colors/brands/tiffany-com), Riot Games (https://brandsweets.com/colors/brands/riotgames-com), Formula 1 (https://brandsweets.com/colors/brands/formula1-com). — https://brandsweets.com/colors/crimson
- **Mustard Yellow** #ffdb58 [pool] — 4 real palettes, including Fresh Juice and Crayon Box put Mustard Yellow beside #21caa2, as the supporting colour. Seen in: Fresh Juice (https://brandsweets.com/palettes/playful#fresh-juice), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Meadow (https://brandsweets.com/palettes/light#meadow), Citrus Grove (https://brandsweets.com/palettes/warm#citrus-grove). — https://brandsweets.com/colors/mustard
- **Taupe** #483c32 [pool] — Taupe is paired with #21caa2 in 18 real palettes, including Chime's brand system and Crayon Box, as the lead colour. Seen in: Chime (https://brandsweets.com/colors/brands/chime-com), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), WhatsApp (https://brandsweets.com/colors/brands/whatsapp-com), Resort (https://brandsweets.com/palettes/light#resort). — https://brandsweets.com/colors/taupe
- **Light Coral** #f08080 [harmony, pool: split] — Light Coral is a split-complement of #21caa2: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Meadow (https://brandsweets.com/palettes/light#meadow). — https://brandsweets.com/colors/lightcoral
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #21caa2: 3 real palettes, including Canva's brand system and Terminal, as the supporting colour. Seen in: Canva (https://brandsweets.com/colors/brands/canva-com), Terminal (https://brandsweets.com/palettes/technical#terminal), Spotify (https://brandsweets.com/colors/brands/spotify). — https://brandsweets.com/colors/cornflowerblue

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

- On white (#ffffff): 2.09:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #15846a (4.63:1); AA: background → #454545 (4.58:1); AAA: text → #10604e (7.49:1); AAA: background → #262626 (7.23:1)
- On black (#000000): 10.03:1 — 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/21caa2-a2bebb-d459b1-1f2a2d-e9f1ec?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: "#21caa2" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.