# #81bb3a

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

## Values

- Hex: `#81bb3a`
- RGB: rgb(129, 187, 58)
- HSL: hsl(87, 53%, 48%)
- OKLCH: oklch(0.727 0.169 130.6)
- Relative luminance: 0.4051
- Nearest named color: Citrus (#9fb70a, Δ 3.604) — https://brandsweets.com/colors/citrus
- Moods: neutral
- Page: https://brandsweets.com/colors/81bb3a

## Tints & shades

- Tints (toward white): #8ec748, #9acd5b, #a6d36f, #b2d982, #bedf96, #cae5a9, #d6ebbd, #e2f1d0, #eef7e4, #fafdf7
- Shades (toward black): #76ac35, #69982f, #5e892a, #517524, #46651f, #3b561a, #2e4214, #233310, #151f0a, #0b1005

## Harmonies

- Complementary: #743abb
- Analogous: #bbb53a, #40bb3a
- Triadic: #3a81bb, #bb3a81
- Split-complementary: #3a40bb, #b53abb
- Tetradic: #3abbb5, #743abb, #bb3a40

## Colors that go with #81bb3a

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 #81bb3a: 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
- **Dark Olive Green** #556b2f [pool] — Dark Olive Green shows up next to #81bb3a in 4 real palettes, including Undergrowth and Forest Floor, as the supporting colour. Seen in: Undergrowth (https://brandsweets.com/palettes/dark#undergrowth), Forest Floor (https://brandsweets.com/palettes/dark#forest-floor), Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com). — https://brandsweets.com/colors/darkolivegreen
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #81bb3a in 5 real palettes, including Brilliant's brand system and Docker's brand system, as the accent. Seen in: Brilliant (https://brandsweets.com/colors/brands/brilliant-org), Docker (https://brandsweets.com/colors/brands/docker-com), Khan Academy (https://brandsweets.com/colors/brands/khanacademy-org), Console Light (https://brandsweets.com/palettes/technical#console-light). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #81bb3a in 13 real palettes, including Acer's brand system and Meadow, as the text colour against it. Seen in: Acer (https://brandsweets.com/colors/brands/acer-com), Meadow (https://brandsweets.com/palettes/light#meadow), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Citrus Grove (https://brandsweets.com/palettes/warm#citrus-grove). — https://brandsweets.com/colors/taupe
- **Orchid** #da70d6 [harmony: complementary] — Orchid sits directly opposite #81bb3a 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 #81bb3a: 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 #81bb3a: 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 Minecraft's brand system and Spotify's brand system put Blue beside #81bb3a, as the accent. Seen in: Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Spotify (https://brandsweets.com/colors/brands/spotify), Unity (https://brandsweets.com/colors/brands/unity-com). — https://brandsweets.com/colors/blue

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

- On white (#ffffff): 2.31:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #598128 (4.57:1); AA: background → #3d3d3d (4.71:1); AAA: text → #405e1d (7.4:1); AAA: background → #1f1f1f (7.14:1)
- On black (#000000): 9.1:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Acer** — primary #83b81a (Δ 1.631) — https://brandsweets.com/colors/brands/acer-com
- **Peloton** — secondary #71bf49 (Δ 1.793) — https://brandsweets.com/colors/brands/peloton-com
- **Peloton** — accent #6fbf4b (Δ 1.975) — https://brandsweets.com/colors/brands/peloton-com

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/81bb3a-aebea2-4e53df-212d1f-f1f1e9?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: "#81bb3a" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.