# #21800a

A color — vivid, dark, luxury, bold. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#21800a`
- RGB: rgb(33, 128, 10)
- HSL: hsl(108, 86%, 27%)
- OKLCH: oklch(0.525 0.167 140.9)
- Relative luminance: 0.1578
- Nearest named color: green (#008000, Δ 1.179) — https://brandsweets.com/colors/green
- Moods: vivid, dark, luxury, bold
- Page: https://brandsweets.com/colors/21800a

## Tints & shades

- Tints (toward white): #2aa10c, #33c20f, #3be411, #51ef2a, #70f250, #8bf471, #a6f792, #c1f9b3, #dcfcd4, #f7fef6
- Shades (toward black): #1f7709, #1b6808, #195f07, #165506, #144c06, #103e05, #0e3404, #0b2b03, #071c02, #051301

## Harmonies

- Complementary: #680a80
- Analogous: #5d800a, #0a802d
- Triadic: #0a2180, #800a21
- Split-complementary: #2d0a80, #800a5d
- Tetradic: #0a5d80, #680a80, #802d0a

## Colors that go with #21800a

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 #21800a: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Canopy (https://brandsweets.com/palettes/cool#canopy), Stanley (https://brandsweets.com/colors/brands/stanley1913-com). — https://brandsweets.com/colors/charcoal
- **Royal Blue** #4169e1 [harmony, pool: triadic] — Royal Blue completes a triad with #21800a — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Xbox (https://brandsweets.com/colors/brands/xbox-com), Coinbase (https://brandsweets.com/colors/brands/coinbase), Subaru (https://brandsweets.com/colors/brands/subaru-com), Console Light (https://brandsweets.com/palettes/technical#console-light). — https://brandsweets.com/colors/royalblue
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #21800a — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Coinbase (https://brandsweets.com/colors/brands/coinbase), Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #21800a: 5 real palettes, including Xbox's brand system and Intel's brand system, as the supporting colour. Seen in: Xbox (https://brandsweets.com/colors/brands/xbox-com), Intel (https://brandsweets.com/colors/brands/intel-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/denim
- **Taupe** #483c32 [pool] — Taupe is paired with #21800a in 9 real palettes, including Acer's brand system and Instacart's brand system, as that palette's text colour. Seen in: Acer (https://brandsweets.com/colors/brands/acer-com), Instacart (https://brandsweets.com/colors/brands/instacart-com), Subaru (https://brandsweets.com/colors/brands/subaru-com), 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com). — https://brandsweets.com/colors/taupe
- **Dark Orchid** #9932cc [harmony: complementary] — Dark Orchid sits directly opposite #21800a 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/darkorchid
- **Medium Violet Red** #c71585 [harmony, pool: split] — Medium Violet Red is a split-complement of #21800a: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Bun (https://brandsweets.com/colors/brands/bun-sh). — https://brandsweets.com/colors/mediumvioletred
- **Blue** #0000ff [pool] — 3 real palettes, including Instacart's brand system and Kia's brand system put Blue beside #21800a, as the accent. Seen in: Instacart (https://brandsweets.com/colors/brands/instacart-com), Kia (https://brandsweets.com/colors/brands/kia-com), Warp (https://brandsweets.com/colors/brands/warp-dev). — https://brandsweets.com/colors/blue

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

- On white (#ffffff): 5.05:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #1a6407 (7.32:1)
- On black (#000000): 4.16:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #248a0a (4.71:1); AA: background → #f2f2f2 (4.51:1); AAA: text → #2eaf0d (7.25:1)

## Brands using this color

- **Converse** — accent #138410 (Δ 1.183) — https://brandsweets.com/colors/brands/converse-com
- **Xbox** — primary #147c14 (Δ 1.545) — https://brandsweets.com/colors/brands/xbox-com

## Fonts for this mood

- luxury: https://brandsweets.com/fonts/mood/luxury
- bold: https://brandsweets.com/fonts/mood/bold

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/21800a-a4bea2-7c4edf-1f2d23-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: "#21800a" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.