# #21b710

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

## Values

- Hex: `#21b710`
- RGB: rgb(33, 183, 16)
- HSL: hsl(114, 84%, 39%)
- OKLCH: oklch(0.679 0.223 141.9)
- Relative luminance: 0.3423
- Nearest named color: Green Glimmer (#00bb00, Δ 1.331) — https://brandsweets.com/colors/green-glimmer
- Moods: vivid
- Page: https://brandsweets.com/colors/21b710

## Tints & shades

- Tints (toward white): #26d312, #2eeb19, #48ed35, #61f051, #7bf26e, #90f485, #aaf7a1, #c3f9bd, #ddfcd9, #f6fef6
- Shades (toward black): #1ea90f, #1b960d, #18880c, #15750a, #126709, #0f5407, #0d4606, #093404, #072603, #031302

## Harmonies

- Complementary: #a610b7
- Analogous: #74b710, #10b753
- Triadic: #1021b7, #b71021
- Split-complementary: #5310b7, #b71074
- Tetradic: #1074b7, #a610b7, #b75310

## Colors that go with #21b710

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

- **Taupe** #483c32 [pool] — Taupe is paired with #21b710 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 #21b710 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
- **Medium Purple** #9370db [harmony, pool: split] — Medium Purple is a split-complement of #21b710: 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 #21b710, 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 #21b710: 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 #21b710 — 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
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #21b710 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
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #21b710 in 3 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). — https://brandsweets.com/colors/royalblue

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

- On white (#ffffff): 2.68:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #18880c (4.6:1); AA: background → #363636 (4.51:1); AAA: text → #126709 (7.07:1); AAA: background → #0f0f0f (7.16:1)
- On black (#000000): 7.85:1 — 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/21b710-a2bea2-8a4edf-1f2d24-eef1e9?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: "#21b710" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.