# #51fc45

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

## Values

- Hex: `#51fc45`
- RGB: rgb(81, 252, 69)
- HSL: hsl(116, 97%, 63%)
- OKLCH: oklch(0.871 0.26 142.1)
- Relative luminance: 0.718
- Nearest named color: Cathode Green (#00ff55, Δ 1.865) — https://brandsweets.com/colors/cathode-green
- Moods: vivid
- Page: https://brandsweets.com/colors/51fc45

## Tints & shades

- Tints (toward white): #64fc59, #72fd68, #85fd7c, #93fd8b, #a6fea0, #b4feaf, #c7fec3, #d5fed2, #e8ffe6, #f6fff5
- Shades (toward black): #35fc27, #19fb09, #12e203, #10c403, #0eab03, #0b8d02, #096f02, #075001, #043201, #021400

## Harmonies

- Complementary: #f045fc
- Analogous: #adfc45, #45fc94
- Triadic: #4551fc, #fc4551
- Split-complementary: #9445fc, #fc45ad
- Tetradic: #45adfc, #f045fc, #fc9445

## Colors that go with #51fc45

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

- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #51fc45 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
- **Deep Sky Blue** #00bfff [harmony, pool: triadic] — Deep Sky Blue completes a triad with #51fc45 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Remix (https://brandsweets.com/colors/brands/remix-run), Prime Video (https://brandsweets.com/colors/brands/primevideo-com). — https://brandsweets.com/colors/deepskyblue
- **Hot Pink** #ff69b4 [harmony: split] — Hot Pink is a split-complement of #51fc45: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/hotpink
- **Blue** #0000ff [pool] — Two real palettes: MongoDB's brand system and Robinhood's brand system put Blue beside #51fc45, 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
- **Charcoal** #36454f [role] — Charcoal is the body-text near-black for #51fc45: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. — https://brandsweets.com/colors/charcoal
- **Lime Green** #32cd32 [pool] — Two real palettes: Duolingo's brand system and Monster Energy's brand system put Lime Green beside #51fc45, 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
- **Plum** #dda0dd [harmony: split] — Plum is a split-complement of #51fc45: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/plum
- **Red** #ff0000 [pool] — Red is paired with #51fc45 in two real palettes: Gatorade's brand system and Wise's brand system, as the supporting colour. Seen in: Gatorade (https://brandsweets.com/colors/brands/gatorade-com), Wise (https://brandsweets.com/colors/brands/wise-com). — https://brandsweets.com/colors/red

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

- On white (#ffffff): 1.37:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0b8802 (4.63:1); AA: background → #616161 (4.53:1); AAA: text → #086402 (7.41:1); AAA: background → #454545 (7.01:1)
- On black (#000000): 15.36:1 — 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/51fc45-a2bea3-8f4edf-1f2d24-eef1e9?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: "#51fc45" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.