# #51bb2a

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

## Values

- Hex: `#51bb2a`
- RGB: rgb(81, 187, 42)
- HSL: hsl(104, 63%, 45%)
- OKLCH: oklch(0.703 0.202 139)
- Relative luminance: 0.3746
- Nearest named color: Exit Light (#55bb33, Δ 0.704) — https://brandsweets.com/colors/exit-light
- Moods: vivid
- Page: https://brandsweets.com/colors/51bb2a

## Tints & shades

- Tints (toward white): #5ad02f, #6ed548, #7eda5d, #8fdf72, #a3e58b, #b3e99f, #c4eeb4, #d4f3c9, #e8f8e2, #f8fdf7
- Shades (toward black): #4aaa27, #439a23, #3b891f, #34791b, #2d6818, #245313, #1d430f, #16320b, #0e2108, #071104

## Harmonies

- Complementary: #942abb
- Analogous: #99bb2a, #2abb4c
- Triadic: #2a51bb, #bb2a51
- Split-complementary: #4c2abb, #bb2a99
- Tetradic: #2a99bb, #942abb, #bb4c2a

## Colors that go with #51bb2a

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 body-text near-black for #51bb2a: 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), Mint Modern (https://brandsweets.com/palettes/modern#mint-modern), Docker (https://brandsweets.com/colors/brands/docker-com). — https://brandsweets.com/colors/charcoal
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #51bb2a in 5 real palettes, including Brilliant's brand system and Console Light, as the accent. Seen in: Brilliant (https://brandsweets.com/colors/brands/brilliant-org), Console Light (https://brandsweets.com/palettes/technical#console-light), Telehealth (https://brandsweets.com/palettes/modern#telehealth), Khan Academy (https://brandsweets.com/colors/brands/khanacademy-org). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #51bb2a in 8 real palettes, including Meadow and Minecraft's brand system, as the text colour against it. Seen in: Meadow (https://brandsweets.com/palettes/light#meadow), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Obsidian (https://brandsweets.com/colors/brands/obsidian-md), Acer (https://brandsweets.com/colors/brands/acer-com). — https://brandsweets.com/colors/taupe
- **Orchid** #da70d6 [harmony: complementary] — Orchid sits directly opposite #51bb2a 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/orchid
- **Hot Pink** #ff69b4 [harmony, pool: split] — Hot Pink is a split-complement of #51bb2a: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Terminal (https://brandsweets.com/palettes/technical#terminal). — https://brandsweets.com/colors/hotpink
- **Cornflower Blue** #6495ed [harmony, pool: split] — Cornflower Blue is a split-complement of #51bb2a: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Terminal (https://brandsweets.com/palettes/technical#terminal), Spotify (https://brandsweets.com/colors/brands/spotify). — https://brandsweets.com/colors/cornflowerblue
- **Blue** #0000ff [pool] — 3 real palettes, including Spotify's brand system and Minecraft's brand system put Blue beside #51bb2a, as the accent. Seen in: Spotify (https://brandsweets.com/colors/brands/spotify), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Unity (https://brandsweets.com/colors/brands/unity-com). — https://brandsweets.com/colors/blue
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #51bb2a in 3 real palettes, including Playground and Learning App, as the lead colour. Seen in: Playground (https://brandsweets.com/palettes/bold#playground), Learning App (https://brandsweets.com/palettes/playful#learning-app), Citrus Grove (https://brandsweets.com/palettes/warm#citrus-grove). — https://brandsweets.com/colors/darkorange

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

- On white (#ffffff): 2.47:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #3a851e (4.61:1); AA: background → #3b3b3b (4.53:1); AAA: text → #2b6417 (7.15:1); AAA: background → #1a1a1a (7.04:1)
- On black (#000000): 8.49:1 — 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/51bb2a-a6bea2-724edf-1f2d22-eff1e9?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: "#51bb2a" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.