# #21db00

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

## Values

- Hex: `#21db00`
- RGB: rgb(33, 219, 0)
- HSL: hsl(111, 100%, 43%)
- OKLCH: oklch(0.775 0.26 141.9)
- Relative luminance: 0.5099
- Nearest named color: Alarming Slime (#2ce335, Δ 2.624) — https://brandsweets.com/colors/alarming-slime
- Moods: vivid
- Page: https://brandsweets.com/colors/21db00

## Tints & shades

- Tints (toward white): #25fa00, #38ff14, #52ff33, #67ff4d, #81ff6b, #97ff85, #b1ffa3, #c7ffbd, #e1ffdb, #f6fff5
- Shades (toward black): #1ec700, #1bb300, #189e00, #158a00, #127a00, #0f6600, #0c5200, #093d00, #062900, #031400

## Harmonies

- Complementary: #ba00db
- Analogous: #8fdb00, #00db4d
- Triadic: #0021db, #db0021
- Split-complementary: #4d00db, #db008f
- Tetradic: #008fdb, #ba00db, #db4d00

## Colors that go with #21db00

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 #21db00 in 8 real palettes, including WhatsApp's brand system and 7-Eleven's brand system, as the supporting colour. Seen in: WhatsApp (https://brandsweets.com/colors/brands/whatsapp-com), 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Obsidian (https://brandsweets.com/colors/brands/obsidian-md). — https://brandsweets.com/colors/taupe
- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #21db00 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/violet
- **Hot Pink** #ff69b4 [harmony, pool: split] — Hot Pink is a split-complement of #21db00: 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
- **Blue** #0000ff [pool] — 3 real palettes, including MongoDB's brand system and Minecraft's brand system put Blue beside #21db00, as the accent. Seen in: MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Spotify (https://brandsweets.com/colors/brands/spotify). — https://brandsweets.com/colors/blue
- **Deep Sky Blue** #00bfff [harmony, pool: triadic] — Deep Sky Blue completes a triad with #21db00 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Learning App (https://brandsweets.com/palettes/playful#learning-app), Remix (https://brandsweets.com/colors/brands/remix-run). — https://brandsweets.com/colors/deepskyblue
- **Light Coral** #f08080 [harmony, pool: triadic] — Light Coral completes a triad with #21db00 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Meadow (https://brandsweets.com/palettes/light#meadow). — https://brandsweets.com/colors/lightcoral
- **Plum** #dda0dd [harmony: split] — Plum is a split-complement of #21db00: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/plum
- **Charcoal** #36454f [role] — Charcoal is the body-text near-black for #21db00: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. — https://brandsweets.com/colors/charcoal

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

- On white (#ffffff): 1.88:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #148500 (4.79:1); AA: background → #4d4d4d (4.51:1); AAA: text → #0f6600 (7.19:1); AAA: background → #303030 (7.04:1)
- On black (#000000): 11.2:1 — 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/21db00-a3bea2-834edf-1f2d23-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: "#21db00" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.