# #21fdc2

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

## Values

- Hex: `#21fdc2`
- RGB: rgb(33, 253, 194)
- HSL: hsl(164, 98%, 56%)
- OKLCH: oklch(0.885 0.176 167.7)
- Relative luminance: 0.7447
- Nearest named color: Hyperpop Green (#17f9a6, Δ 3.55) — https://brandsweets.com/colors/hyperpop-green
- Moods: vivid
- Page: https://brandsweets.com/colors/21fdc2

## Tints & shades

- Tints (toward white): #35fdc8, #49fdcd, #62fdd4, #77feda, #8bfedf, #9ffee5, #b3feea, #cdfef1, #e1fff7, #f5fffc
- Shades (toward black): #08fdbb, #02e8ab, #02ca95, #02b182, #02976f, #017e5d, #01654a, #014734, #002d21, #00140f

## Harmonies

- Complementary: #fd215b
- Analogous: #21fd54, #21c9fd
- Triadic: #c221fd, #fdc221
- Split-complementary: #fd21c9, #fd5421
- Tetradic: #5421fd, #fd215b, #c9fd21

## Colors that go with #21fdc2

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Taupe** #483c32 [pool] — Taupe is paired with #21fdc2 in 4 real palettes, including Astro's brand system and 7-Eleven's brand system, as the text colour against it. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), Mint Chip (https://brandsweets.com/palettes/light#mint-chip), Macaron (https://brandsweets.com/palettes/light#macaron). — https://brandsweets.com/colors/taupe
- **Hot Pink** #ff69b4 [harmony: complementary] — Hot Pink sits directly opposite #21fdc2 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/hotpink
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #21fdc2: softer than #000 and cool enough to feel like part of the same palette. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com), Canopy (https://brandsweets.com/palettes/cool#canopy). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [pool] — Crimson is paired with #21fdc2 in 3 real palettes, including Formula 1's brand system and Wise's brand system, as the supporting colour. Seen in: Formula 1 (https://brandsweets.com/colors/brands/formula1-com), Wise (https://brandsweets.com/colors/brands/wise-com), Tiffany & Co. (https://brandsweets.com/colors/brands/tiffany-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #21fdc2: 3 real palettes, including Astro's brand system and Prime Video's brand system, as the supporting colour. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Prime Video (https://brandsweets.com/colors/brands/primevideo-com), Remix (https://brandsweets.com/colors/brands/remix-run). — https://brandsweets.com/colors/deepskyblue
- **Light Coral** #f08080 [harmony: split] — Light Coral is a split-complement of #21fdc2: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/lightcoral
- **Violet** #ee82ee [harmony: split] — Violet is a split-complement of #21fdc2: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/violet
- **Lime Green** #32cd32 [harmony, pool: analogous] — Lime Green is #21fdc2's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Duolingo (https://brandsweets.com/colors/brands/duolingo). — https://brandsweets.com/colors/limegreen

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

- On white (#ffffff): 1.32:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #018361 (4.75:1); AA: background → #636363 (4.55:1); AAA: text → #01654a (7.09:1); AAA: background → #474747 (7.03:1)
- On black (#000000): 15.89:1 — 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/21fdc2-a2beba-d459b5-1f2b2d-e9f1eb?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: "#21fdc2" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.