# #81a121

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

## Values

- Hex: `#81a121`
- RGB: rgb(129, 161, 33)
- HSL: hsl(75, 66%, 38%)
- OKLCH: oklch(0.662 0.151 123.3)
- Relative luminance: 0.3027
- Nearest named color: BioShock (#889900, Δ 2.18) — https://brandsweets.com/colors/bioshock
- Moods: vivid
- Page: https://brandsweets.com/colors/81a121

## Tints & shades

- Tints (toward white): #95ba26, #aad42b, #b4d945, #bede5e, #c8e378, #d3e891, #ddeeaa, #e7f3c4, #f1f8dd, #fcfdf7
- Shades (toward black): #77941e, #69831b, #5f7718, #516615, #475912, #3d4c10, #2f3b0c, #252f0a, #181e06, #0e1103

## Harmonies

- Complementary: #4121a1
- Analogous: #a18121, #41a121
- Triadic: #2181a1, #a12181
- Split-complementary: #2141a1, #8121a1
- Tetradic: #21a181, #4121a1, #a12141

## Colors that go with #81a121

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

- **Medium Purple** #9370db [harmony, pool: complementary] — Medium Purple sits directly opposite #81a121 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Next.js (https://brandsweets.com/colors/brands/nextjs-org), Obsidian (https://brandsweets.com/colors/brands/obsidian-md). — https://brandsweets.com/colors/mediumpurple
- **Blue** #0000ff [pool] — 5 real palettes, including Spotify's brand system and Minecraft's brand system put Blue beside #81a121, 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), Rolex (https://brandsweets.com/colors/brands/rolex-com). — https://brandsweets.com/colors/blue
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #81a121: 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), Puma (https://brandsweets.com/colors/brands/puma-com), Mint Modern (https://brandsweets.com/palettes/modern#mint-modern). — https://brandsweets.com/colors/charcoal
- **Dark Olive Green** #556b2f [pool] — Dark Olive Green shows up next to #81a121 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), Cider (https://brandsweets.com/palettes/warm#cider). — https://brandsweets.com/colors/darkolivegreen
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #81a121 in 5 real palettes, including Console Light and Telehealth, as the lead colour. Seen in: Console Light (https://brandsweets.com/palettes/technical#console-light), Telehealth (https://brandsweets.com/palettes/modern#telehealth), Brilliant (https://brandsweets.com/colors/brands/brilliant-org), Guinness (https://brandsweets.com/colors/brands/guinness-com). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #81a121 in 14 real palettes, including Acer's brand system and Undergrowth, as the text colour against it. Seen in: Acer (https://brandsweets.com/colors/brands/acer-com), Undergrowth (https://brandsweets.com/palettes/dark#undergrowth), Meadow (https://brandsweets.com/palettes/light#meadow), Minecraft (https://brandsweets.com/colors/brands/minecraft-net). — https://brandsweets.com/colors/taupe
- **Cornflower Blue** #6495ed [harmony, pool: split] — Cornflower Blue is a split-complement of #81a121: 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
- **Dodger Blue** #1e90ff [pool] — Designers have shipped Dodger Blue with #81a121: 3 real palettes, including Spline's brand system and Unity's brand system, as the lead colour. Seen in: Spline (https://brandsweets.com/colors/brands/spline-design), Unity (https://brandsweets.com/colors/brands/unity-com), Playground (https://brandsweets.com/palettes/bold#playground). — https://brandsweets.com/colors/dodgerblue

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

- On white (#ffffff): 2.98:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #667f1a (4.55:1); AA: background → #2e2e2e (4.56:1); AAA: text → #4b5d13 (7.31:1); AAA: background → #000000 (7.05:1)
- On black (#000000): 7.05:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Zendesk** — primary #70a32a (Δ 1.987) — https://brandsweets.com/colors/brands/zendesk-com

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/81a121-b4bea2-4e70df-242d1f-f1efe9?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: "#81a121" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.