# #21ba2b

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

## Values

- Hex: `#21ba2b`
- RGB: rgb(33, 186, 43)
- HSL: hsl(124, 70%, 43%)
- OKLCH: oklch(0.688 0.216 143.4)
- Relative luminance: 0.3562
- Nearest named color: Green Glimmer (#00bb00, Δ 1.796) — https://brandsweets.com/colors/green-glimmer
- Moods: vivid
- Page: https://brandsweets.com/colors/21ba2b

## Tints & shades

- Tints (toward white): #25d431, #38dc43, #52e05b, #67e470, #81e988, #97ed9d, #b1f1b5, #c7f5ca, #e1fae2, #f6fdf7
- Shades (toward black): #1ea927, #1b9823, #18861f, #15751b, #126818, #0f5714, #0c4510, #09340c, #062308, #031104

## Harmonies

- Complementary: #ba21b0
- Analogous: #63ba21, #21ba78
- Triadic: #2b21ba, #ba2b21
- Split-complementary: #7821ba, #ba2163
- Tetradic: #2163ba, #ba21b0, #ba7821

## Colors that go with #21ba2b

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

- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #21ba2b in 4 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 #21ba2b in 8 real palettes, including Obsidian's brand system and Meadow, as the text colour against it. Seen in: Obsidian (https://brandsweets.com/colors/brands/obsidian-md), Meadow (https://brandsweets.com/palettes/light#meadow), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Acer (https://brandsweets.com/colors/brands/acer-com). — https://brandsweets.com/colors/taupe
- **Fuchsia** #ff00ff [harmony: complementary] — Fuchsia sits directly opposite #21ba2b 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/fuchsia
- **Hot Pink** #ff69b4 [harmony, pool: split] — Hot Pink is a split-complement of #21ba2b: 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
- **Medium Purple** #9370db [harmony, pool: split] — Medium Purple is a split-complement of #21ba2b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Obsidian (https://brandsweets.com/colors/brands/obsidian-md), Next.js (https://brandsweets.com/colors/brands/nextjs-org). — https://brandsweets.com/colors/mediumpurple
- **Blue** #0000ff [pool] — 3 real palettes, including Spotify's brand system and Minecraft's brand system put Blue beside #21ba2b, 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
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #21ba2b: 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). — https://brandsweets.com/colors/charcoal
- **Cornflower Blue** #6495ed [harmony, pool: triadic] — Cornflower Blue completes a triad with #21ba2b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Spotify (https://brandsweets.com/colors/brands/spotify), Terminal (https://brandsweets.com/palettes/technical#terminal). — https://brandsweets.com/colors/cornflowerblue

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

- On white (#ffffff): 2.59:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #18861f (4.7:1); AA: background → #383838 (4.54:1); AAA: text → #126417 (7.34:1); AAA: background → #141414 (7.13:1)
- On black (#000000): 8.12:1 — 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/21ba2b-a2bea7-a24edf-1f2d26-edf1e9?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: "#21ba2b" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.