# #3fef39

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

## Values

- Hex: `#3fef39`
- RGB: rgb(63, 239, 57)
- HSL: hsl(118, 85%, 58%)
- OKLCH: oklch(0.833 0.257 142.5)
- Relative luminance: 0.6309
- Nearest named color: Becquerel (#4bec13, Δ 1.354) — https://brandsweets.com/colors/becquerel
- Moods: vivid
- Page: https://brandsweets.com/colors/3fef39

## Tints & shades

- Tints (toward white): #51f04c, #64f25f, #76f471, #88f584, #9af797, #adf8aa, #bffabd, #d1fbd0, #e4fde3, #f6fef6
- Shades (toward black): #28ed21, #19de12, #16c610, #13aa0e, #10920c, #0e7b0a, #0b5e08, #084706, #052a03, #021302

## Harmonies

- Complementary: #e939ef
- Analogous: #9aef39, #39ef8e
- Triadic: #393fef, #ef393f
- Split-complementary: #8e39ef, #ef399a
- Tetradic: #399aef, #e939ef, #ef8e39

## Colors that go with #3fef39

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 #3fef39 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 [pool] — Designers have shipped Deep Sky Blue with #3fef39: 3 real palettes, including Remix's brand system and Learning App, as the lead colour. Seen in: Remix (https://brandsweets.com/colors/brands/remix-run), Learning App (https://brandsweets.com/palettes/playful#learning-app), Prime Video (https://brandsweets.com/colors/brands/primevideo-com). — https://brandsweets.com/colors/deepskyblue
- **Hot Pink** #ff69b4 [harmony: split] — Hot Pink is a split-complement of #3fef39: 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 #3fef39: 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 #3fef39: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/plum
- **Red** #ff0000 [pool] — Red is paired with #3fef39 in two real palettes: Gatorade's brand system and Wise's brand system, as the supporting colour. Seen in: Gatorade (https://brandsweets.com/colors/brands/gatorade-com), Wise (https://brandsweets.com/colors/brands/wise-com). — https://brandsweets.com/colors/red
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #3fef39 in two real palettes: MongoDB's brand system and Brilliant's brand system, as the supporting colour. Seen in: MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Brilliant (https://brandsweets.com/colors/brands/brilliant-org). — https://brandsweets.com/colors/royalblue
- **Taupe** #483c32 [pool] — Taupe is paired with #3fef39 in two real palettes: 7-Eleven's brand system and WhatsApp's brand system, as the lead colour. Seen in: 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), WhatsApp (https://brandsweets.com/colors/brands/whatsapp-com). — https://brandsweets.com/colors/taupe

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

- On white (#ffffff): 1.54:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0f890b (4.56:1); AA: background → #595959 (4.54:1); AAA: text → #0c6808 (7:1); AAA: background → #3d3d3d (7.04:1)
- On black (#000000): 13.62:1 — 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/3fef39-a2bea4-944edf-1f2d25-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: "#3fef39" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.