# #4ef401

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

## Values

- Hex: `#4ef401`
- RGB: rgb(78, 244, 1)
- HSL: hsl(101, 99%, 48%)
- OKLCH: oklch(0.847 0.273 140)
- Relative luminance: 0.6632
- Nearest named color: Becquerel (#4bec13, Δ 2.279) — https://brandsweets.com/colors/becquerel
- Moods: vivid
- Page: https://brandsweets.com/colors/4ef401

## Tints & shades

- Tints (toward white): #5cfe10, #6dfe2a, #7efe43, #90fe5d, #a1fe76, #b3fe8f, #c4ffa9, #d5ffc2, #e7ffdb, #f8fff5
- Shades (toward black): #47df01, #3fc601, #39b201, #319801, #2a8401, #247001, #1c5600, #154200, #0d2900, #061400

## Harmonies

- Complementary: #a701f4
- Analogous: #c7f401, #01f42e
- Triadic: #014ef4, #f4014e
- Split-complementary: #2e01f4, #f401c7
- Tetradic: #01c7f4, #a701f4, #f42e01

## Colors that go with #4ef401

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

- **Deep Sky Blue** #00bfff [harmony, pool: triadic] — Deep Sky Blue completes a triad with #4ef401 — 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), Learning App (https://brandsweets.com/palettes/playful#learning-app), Prime Video (https://brandsweets.com/colors/brands/primevideo-com). — https://brandsweets.com/colors/deepskyblue
- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #4ef401 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: split] — Hot Pink is a split-complement of #4ef401: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/hotpink
- **Blue** #0000ff [pool] — Two real palettes: MongoDB's brand system and Robinhood's brand system put Blue beside #4ef401, as the accent. Seen in: MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Robinhood (https://brandsweets.com/colors/brands/robinhood-com). — https://brandsweets.com/colors/blue
- **Charcoal** #36454f [role] — Charcoal is the body-text near-black for #4ef401: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. — https://brandsweets.com/colors/charcoal
- **Lilac** #c8a2c8 [harmony: split] — Lilac is a split-complement of #4ef401: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/lilac
- **Red** #ff0000 [pool] — Red is paired with #4ef401 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
- **Light Coral** #f08080 [harmony: triadic] — Light Coral completes a triad with #4ef401 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. — https://brandsweets.com/colors/lightcoral

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

- On white (#ffffff): 1.47:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #2a8401 (4.77:1); AA: background → #5c5c5c (4.54:1); AAA: text → #206501 (7.18:1); AAA: background → #404040 (7.04:1)
- On black (#000000): 14.26:1 — 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/4ef401-a7bea2-6b4edf-1f2d21-eff1e9?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: "#4ef401" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.