# #21aba4

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

## Values

- Hex: `#21aba4`
- RGB: rgb(33, 171, 164)
- HSL: hsl(177, 68%, 40%)
- OKLCH: oklch(0.672 0.11 189.5)
- Relative luminance: 0.3213
- Nearest named color: Billiard (#00af9f, Δ 1.683) — https://brandsweets.com/colors/billiard
- Moods: vivid
- Page: https://brandsweets.com/colors/21aba4

## Tints & shades

- Tints (toward white): #26c5bd, #31d8d0, #47dcd4, #60e1da, #7ae6e0, #94ebe6, #aeefec, #c3f4f1, #ddf8f7, #f6fdfd
- Shades (toward black): #1d9a94, #1b8d88, #187c77, #156f6b, #125e5a, #0f4d4a, #0c403e, #092f2d, #072221, #031110

## Harmonies

- Complementary: #ab2128
- Analogous: #21ab5f, #216dab
- Triadic: #a421ab, #aba421
- Split-complementary: #ab216d, #ab5f21
- Tetradic: #5f21ab, #ab2128, #6dab21

## Colors that go with #21aba4

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 #21aba4: softer than #000 and cool enough to feel like part of the same palette. Seen in: N26 (https://brandsweets.com/colors/brands/n26-com), Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Coastal (https://brandsweets.com/palettes/cool#coastal), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool). — https://brandsweets.com/colors/charcoal
- **Denim** #1560bd [pool] — Designers have shipped Denim with #21aba4: 5 real palettes, including Peacock and Open House, as the supporting colour. Seen in: Peacock (https://brandsweets.com/palettes/vivid#peacock), Open House (https://brandsweets.com/palettes/clean#open-house), Gopro (https://brandsweets.com/colors/brands/gopro-com), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 7 real palettes, including Ford's brand system and Tide Pool put Midnight Blue beside #21aba4, as the lead colour. Seen in: Ford (https://brandsweets.com/colors/brands/ford-com), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), Confluent (https://brandsweets.com/colors/brands/confluent-io), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/midnightblue
- **Orange** #ffa500 [pool] — 4 real palettes, including Mint Modern and Gopro's brand system put Orange beside #21aba4, as the accent. Seen in: Mint Modern (https://brandsweets.com/palettes/modern#mint-modern), Gopro (https://brandsweets.com/colors/brands/gopro-com), Olympics (https://brandsweets.com/colors/brands/olympics-com), Graphite (https://brandsweets.com/palettes/technical#graphite). — https://brandsweets.com/colors/orange
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #21aba4 in 4 real palettes, including Confluent's brand system and Khan Academy's brand system, as the supporting colour. Seen in: Confluent (https://brandsweets.com/colors/brands/confluent-io), Khan Academy (https://brandsweets.com/colors/brands/khanacademy-org), Brilliant (https://brandsweets.com/colors/brands/brilliant-org), Elastic (https://brandsweets.com/colors/brands/elastic-co). — https://brandsweets.com/colors/royalblue
- **Steel Blue** #4682b4 [pool] — Designers have shipped Steel Blue with #21aba4: 4 real palettes, including Fintech Trust and Deep Water, as the supporting colour. Seen in: Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Deep Water (https://brandsweets.com/palettes/dark#deep-water), Telegram (https://brandsweets.com/colors/brands/telegram-org), Olympics (https://brandsweets.com/colors/brands/olympics-com). — https://brandsweets.com/colors/steelblue
- **Taupe** #483c32 [pool] — Taupe is paired with #21aba4 in 12 real palettes, including Resort and Rain Garden, as the text colour against it. Seen in: Resort (https://brandsweets.com/palettes/light#resort), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Still Water (https://brandsweets.com/palettes/cool#still-water), Polaroid (https://brandsweets.com/palettes/light#polaroid). — https://brandsweets.com/colors/taupe
- **Tomato** #ff6347 [harmony, pool: split] — Tomato is a split-complement of #21aba4: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Lido (https://brandsweets.com/palettes/vivid#lido), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box), Hermès (https://brandsweets.com/colors/brands/hermes-com). — https://brandsweets.com/colors/tomato

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

- On white (#ffffff): 2.83:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #18817b (4.7:1); AA: background → #303030 (4.67:1); AAA: text → #13635f (7.05:1); AAA: background → #0a0a0a (7:1)
- On black (#000000): 7.43:1 — 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/21aba4-a2bcbe-d4599b-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: "#21aba4" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.