# #51fbb4

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

## Values

- Hex: `#51fbb4`
- RGB: rgb(81, 251, 180)
- HSL: hsl(155, 96%, 65%)
- OKLCH: oklch(0.884 0.171 161.3)
- Relative luminance: 0.7404
- Nearest named color: Illicit Green (#56fca2, Δ 2.345) — https://brandsweets.com/colors/illicit-green
- Moods: vivid
- Page: https://brandsweets.com/colors/51fbb4

## Tints & shades

- Tints (toward white): #5ffcba, #73fcc3, #82fcc9, #91fdd0, #a5fdd8, #b4fddf, #c3fee5, #d2feec, #e6fef4, #f5fffb
- Shades (toward black): #32fba7, #14fa9a, #05eb8b, #04cd79, #04af68, #038c53, #026e41, #02502f, #01321e, #00140c

## Harmonies

- Complementary: #fb5097
- Analogous: #50fb5e, #50edfb
- Triadic: #b450fb, #fbb450
- Split-complementary: #fb50ed, #fb5e50
- Tetradic: #5e50fb, #fb5097, #edfb50

## Colors that go with #51fbb4

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 #51fbb4: softer than #000 and cool enough to feel like part of the same palette. Seen in: Canopy (https://brandsweets.com/palettes/cool#canopy), Docker (https://brandsweets.com/colors/brands/docker-com), Zendesk (https://brandsweets.com/colors/brands/zendesk-com). — https://brandsweets.com/colors/charcoal
- **Taupe** #483c32 [pool] — Taupe is paired with #51fbb4 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), Macaron (https://brandsweets.com/palettes/light#macaron), Mint Chip (https://brandsweets.com/palettes/light#mint-chip). — https://brandsweets.com/colors/taupe
- **Hot Pink** #ff69b4 [harmony: complementary] — Hot Pink sits directly opposite #51fbb4 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
- **Crimson** #dc143c [pool] — Crimson is paired with #51fbb4 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 #51fbb4: 3 real palettes, including Prime Video's brand system and Astro's brand system, as the supporting colour. Seen in: Prime Video (https://brandsweets.com/colors/brands/primevideo-com), Astro (https://brandsweets.com/colors/brands/astro-build), 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 #51fbb4: 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 #51fbb4: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/violet
- **Hunter Green** #355e3b [pool] — Hunter Green is paired with #51fbb4 in two real palettes: Neon's brand system and Canopy, as the supporting colour. Seen in: Neon (https://brandsweets.com/colors/brands/neon-tech), Canopy (https://brandsweets.com/palettes/cool#canopy). — https://brandsweets.com/colors/hunter-green

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

- On white (#ffffff): 1.33:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #038750 (4.58:1); AA: background → #636363 (4.52:1); AAA: text → #02643b (7.27:1); AAA: background → #454545 (7.22:1)
- On black (#000000): 15.81:1 — 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/51fbb4-a2beb6-d459c8-1f2d2d-e9f1ea?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: "#51fbb4" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.