# #51cd80

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

## Values

- Hex: `#51cd80`
- RGB: rgb(81, 205, 128)
- HSL: hsl(143, 55%, 56%)
- OKLCH: oklch(0.76 0.157 153.1)
- Relative luminance: 0.4697
- Nearest named color: Emerald Green (#50c878, Δ 1.511) — https://brandsweets.com/colors/emerald-green
- Moods: neutral
- Page: https://brandsweets.com/colors/51cd80

## Tints & shades

- Tints (toward white): #61d18c, #71d697, #84dba6, #94e0b1, #a4e5bd, #b4e9c8, #c4eed4, #d7f4e2, #e7f8ee, #f7fdf9
- Shades (toward black): #3dc772, #35b666, #2e9e59, #288a4e, #227743, #1d6338, #174f2c, #10371f, #0a2414, #051009

## Harmonies

- Complementary: #cd519d
- Analogous: #5fcd51, #51cdbe
- Triadic: #8051cd, #cd8051
- Split-complementary: #be51cd, #cd515f
- Tetradic: #515fcd, #cd519d, #cdbe51

## Colors that go with #51cd80

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 #51cd80: softer than #000 and cool enough to feel like part of the same palette. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com), Mint Modern (https://brandsweets.com/palettes/modern#mint-modern), Lagoon (https://brandsweets.com/palettes/vivid#lagoon), Canopy (https://brandsweets.com/palettes/cool#canopy). — https://brandsweets.com/colors/charcoal
- **Blue** #0000ff [pool] — 5 real palettes, including Minecraft's brand system and Unity's brand system put Blue beside #51cd80, as the accent. Seen in: Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Unity (https://brandsweets.com/colors/brands/unity-com), Spotify (https://brandsweets.com/colors/brands/spotify), MongoDB (https://brandsweets.com/colors/brands/mongodb-com). — https://brandsweets.com/colors/blue
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #51cd80: 4 real palettes, including Remix's brand system and Learning App, as the lead colour. Seen in: Remix (https://brandsweets.com/colors/brands/remix-run), Learning App (https://brandsweets.com/palettes/playful#learning-app), Prime Video (https://brandsweets.com/colors/brands/primevideo-com), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/deepskyblue
- **Mustard Yellow** #ffdb58 [pool] — 4 real palettes, including Fresh Juice and Meadow put Mustard Yellow beside #51cd80, as the supporting colour. Seen in: Fresh Juice (https://brandsweets.com/palettes/playful#fresh-juice), Meadow (https://brandsweets.com/palettes/light#meadow), Citrus Grove (https://brandsweets.com/palettes/warm#citrus-grove), Crayon Box (https://brandsweets.com/palettes/playful#crayon-box). — https://brandsweets.com/colors/mustard
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #51cd80 in 4 real palettes, including Docker's brand system and Brilliant's brand system, as the supporting colour. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com), Brilliant (https://brandsweets.com/colors/brands/brilliant-org), Khan Academy (https://brandsweets.com/colors/brands/khanacademy-org), MongoDB (https://brandsweets.com/colors/brands/mongodb-com). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #51cd80 in 15 real palettes, including WhatsApp's brand system and Chime's brand system, as the supporting colour. Seen in: WhatsApp (https://brandsweets.com/colors/brands/whatsapp-com), Chime (https://brandsweets.com/colors/brands/chime-com), Obsidian (https://brandsweets.com/colors/brands/obsidian-md), Minecraft (https://brandsweets.com/colors/brands/minecraft-net). — https://brandsweets.com/colors/taupe
- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #51cd80 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/violet
- **Light Coral** #f08080 [harmony, pool: split] — Light Coral is a split-complement of #51cd80: 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

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

- On white (#ffffff): 2.02:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #27864c (4.56:1); AA: background → #474747 (4.6:1); AAA: text → #1d6338 (7.26:1); AAA: background → #2b2b2b (7.01:1)
- On black (#000000): 10.39:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Supabase** — primary #3ecf8e (Δ 1.732) — https://brandsweets.com/colors/brands/supabase

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/51cd80-a2beb0-c859d4-1f2d2b-eaf1e9?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: "#51cd80" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.