# #21fd12

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

## Values

- Hex: `#21fd12`
- RGB: rgb(33, 253, 18)
- HSL: hsl(116, 98%, 53%)
- OKLCH: oklch(0.863 0.289 142.3)
- Relative luminance: 0.7062
- Nearest named color: Acid (#00ff22, Δ 0.567) — https://brandsweets.com/colors/acid
- Moods: vivid
- Page: https://brandsweets.com/colors/21fd12

## Tints & shades

- Tints (toward white): #39fd2b, #4cfd3f, #63fd58, #76fe6d, #8efe86, #a1fe9a, #b8feb3, #cbfec7, #e3ffe1, #f6fff5
- Shades (toward black): #12f202, #11d902, #0fc002, #0da702, #0b9201, #097901, #076001, #054701, #032d00, #021400

## Harmonies

- Complementary: #ed12fd
- Analogous: #97fd12, #12fd77
- Triadic: #1221fd, #fd1221
- Split-complementary: #7712fd, #fd1297
- Tetradic: #1297fd, #ed12fd, #fd7712

## Colors that go with #21fd12

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

- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #21fd12 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
- **Deep Sky Blue** #00bfff [harmony, pool: triadic] — Deep Sky Blue completes a triad with #21fd12 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Remix (https://brandsweets.com/colors/brands/remix-run). — https://brandsweets.com/colors/deepskyblue
- **Hot Pink** #ff69b4 [harmony: split] — Hot Pink is a split-complement of #21fd12: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/hotpink
- **Charcoal** #36454f [role] — Charcoal is the body-text near-black for #21fd12: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. — https://brandsweets.com/colors/charcoal
- **Plum** #dda0dd [harmony: split] — Plum is a split-complement of #21fd12: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/plum
- **Light Coral** #f08080 [harmony: triadic] — Light Coral completes a triad with #21fd12 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. — https://brandsweets.com/colors/lightcoral
- **Medium Aquamarine** #66cdaa [harmony: analogous] — Medium Aquamarine is #21fd12's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. — https://brandsweets.com/colors/mediumaquamarine
- **Blue** #0000ff [pool] — MongoDB's brand system puts Blue beside #21fd12, as the accent. Seen in: MongoDB (https://brandsweets.com/colors/brands/mongodb-com). — https://brandsweets.com/colors/blue

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

- On white (#ffffff): 1.39:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0a8801 (4.63:1); AA: background → #5e5e5e (4.67:1); AAA: text → #086501 (7.31:1); AAA: background → #424242 (7.24:1)
- On black (#000000): 15.12:1 — AA pass, AA-large pass, AAA pass

## Curated palettes containing it

- **Laser** (neon, vivid, dark, technical) — #39ff14, #bf00ff, #00e5ff, #07070d, #eefaf0 — Laser green, violet and cyan — the synthwave/gaming set; keep the type near-white and let one neon own each screen. — tool: https://brandsweets.com/palettes/new/39ff14-bf00ff-00e5ff-07070d-eefaf0 — collection: https://brandsweets.com/palettes/neon

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/21fd12-a2bea3-8f4edf-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: "#21fd12" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.