# #51f565

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

## Values

- Hex: `#51f565`
- RGB: rgb(81, 245, 101)
- HSL: hsl(127, 89%, 64%)
- OKLCH: oklch(0.856 0.231 145.1)
- Relative luminance: 0.6799
- Nearest named color: Experimintal Green (#4cff7b, Δ 2.926) — https://brandsweets.com/colors/experimintal-green
- Moods: vivid
- Page: https://brandsweets.com/colors/51f565

## Tints & shades

- Tints (toward white): #60f671, #73f783, #82f88f, #95f9a1, #a3faad, #b2fbba, #c5fccc, #d4fcd8, #e7feea, #f5fef6
- Shades (toward black): #35f34b, #18f231, #0dde25, #0bc120, #0aa41c, #088717, #066a12, #044d0d, #033008, #011303

## Harmonies

- Complementary: #f551e2
- Analogous: #90f551, #51f5b6
- Triadic: #6551f5, #f56551
- Split-complementary: #b651f5, #f55190
- Tetradic: #5190f5, #f551e2, #f5b651

## Colors that go with #51f565

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

- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #51f565: 4 real palettes, including Remix's brand system and Prime Video's brand system, as the lead colour. Seen in: Remix (https://brandsweets.com/colors/brands/remix-run), Prime Video (https://brandsweets.com/colors/brands/primevideo-com), Learning App (https://brandsweets.com/palettes/playful#learning-app), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/deepskyblue
- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #51f565 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
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #51f565: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Zendesk (https://brandsweets.com/colors/brands/zendesk-com). — https://brandsweets.com/colors/charcoal
- **Taupe** #483c32 [pool] — Taupe is paired with #51f565 in 3 real palettes, including 7-Eleven's brand system and WhatsApp's brand system, as the lead colour. Seen in: 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), WhatsApp (https://brandsweets.com/colors/brands/whatsapp-com), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/taupe
- **Hot Pink** #ff69b4 [harmony: split] — Hot Pink is a split-complement of #51f565: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/hotpink
- **Plum** #dda0dd [harmony: split] — Plum is a split-complement of #51f565: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/plum
- **Blue** #0000ff [pool] — Two real palettes: MongoDB's brand system and Robinhood's brand system put Blue beside #51f565, as the accent. Seen in: MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Robinhood (https://brandsweets.com/colors/brands/robinhood-com). — https://brandsweets.com/colors/blue
- **Lime Green** #32cd32 [pool] — Two real palettes: Duolingo's brand system and Monster Energy's brand system put Lime Green beside #51f565, as the lead colour. Seen in: Duolingo (https://brandsweets.com/colors/brands/duolingo), Monster Energy (https://brandsweets.com/colors/brands/monsterenergy-com). — https://brandsweets.com/colors/limegreen

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

- On white (#ffffff): 1.44:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #088717 (4.68:1); AA: background → #5e5e5e (4.51:1); AAA: text → #066511 (7.3:1); AAA: background → #404040 (7.21:1)
- On black (#000000): 14.6:1 — 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/51f565-a2bea8-aa4edf-1f2d27-ecf1e9?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: "#51f565" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.