# #51f231

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

## Values

- Hex: `#51f231`
- RGB: rgb(81, 242, 49)
- HSL: hsl(110, 88%, 57%)
- OKLCH: oklch(0.844 0.259 140.9)
- Relative luminance: 0.6548
- Nearest named color: Becquerel (#4bec13, Δ 1.866) — https://brandsweets.com/colors/becquerel
- Moods: vivid
- Page: https://brandsweets.com/colors/51f231

## Tints & shades

- Tints (toward white): #61f344, #71f457, #82f66a, #92f77e, #a6f896, #b6f9a9, #c6fbbc, #d7fccf, #e7fde2, #f7fef5
- Shades (toward black): #3df019, #30dd0e, #2bc50d, #26ad0b, #219509, #1a7808, #156006, #104805, #092b03, #041301

## Harmonies

- Complementary: #d231f2
- Analogous: #b2f231, #31f271
- Triadic: #3151f2, #f23151
- Split-complementary: #7131f2, #f231b2
- Tetradic: #31b2f2, #d231f2, #f27131

## Colors that go with #51f231

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 [harmony, pool: triadic] — Deep Sky Blue completes a triad with #51f231 — 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), Learning App (https://brandsweets.com/palettes/playful#learning-app), Prime Video (https://brandsweets.com/colors/brands/primevideo-com). — https://brandsweets.com/colors/deepskyblue
- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #51f231 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
- **Hot Pink** #ff69b4 [harmony: split] — Hot Pink is a split-complement of #51f231: 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 #51f231, 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 #51f231: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. — https://brandsweets.com/colors/charcoal
- **Lilac** #c8a2c8 [harmony: split] — Lilac is a split-complement of #51f231: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/lilac
- **Red** #ff0000 [pool] — Red is paired with #51f231 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
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #51f231 in two real palettes: MongoDB's brand system and Brilliant's brand system, as the supporting colour. Seen in: MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Brilliant (https://brandsweets.com/colors/brands/brilliant-org). — https://brandsweets.com/colors/royalblue

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

- On white (#ffffff): 1.49:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #1e8609 (4.7:1); AA: background → #595959 (4.7:1); AAA: text → #166506 (7.25:1); AAA: background → #3d3d3d (7.29:1)
- On black (#000000): 14.1:1 — 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/51f231-a3bea2-814edf-1f2d23-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: "#51f231" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.