# #4efd91

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

## Values

- Hex: `#4efd91`
- RGB: rgb(78, 253, 145)
- HSL: hsl(143, 98%, 65%)
- OKLCH: oklch(0.881 0.205 151.9)
- Relative luminance: 0.7391
- Nearest named color: Illicit Green (#56fca2, Δ 2.245) — https://brandsweets.com/colors/illicit-green
- Moods: vivid
- Page: https://brandsweets.com/colors/4efd91

## Tints & shades

- Tints (toward white): #5dfd9b, #72fea7, #81feb1, #90feba, #a4fec7, #b3fed0, #c2fed9, #d2ffe3, #e6ffef, #f5fff9
- Shades (toward black): #30fd7f, #12fd6c, #02ed5c, #02cf51, #02b145, #018d37, #016f2b, #01511f, #013214, #001408

## Harmonies

- Complementary: #fd4eba
- Analogous: #63fd4e, #4efde9
- Triadic: #914efd, #fd914e
- Split-complementary: #e94efd, #fd4e63
- Tetradic: #4e63fd, #fd4eba, #fde94e

## Colors that go with #4efd91

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 #4efd91 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
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #4efd91: softer than #000 and cool enough to feel like part of the same palette. Seen in: Zendesk (https://brandsweets.com/colors/brands/zendesk-com). — https://brandsweets.com/colors/charcoal
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #4efd91: 3 real palettes, including Prime Video's brand system and Remix's brand system, as the supporting colour. Seen in: Prime Video (https://brandsweets.com/colors/brands/primevideo-com), Remix (https://brandsweets.com/colors/brands/remix-run), Astro (https://brandsweets.com/colors/brands/astro-build). — https://brandsweets.com/colors/deepskyblue
- **Light Coral** #f08080 [harmony: split] — Light Coral is a split-complement of #4efd91: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/lightcoral
- **Plum** #dda0dd [harmony: split] — Plum is a split-complement of #4efd91: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/plum
- **Blue** #0000ff [pool] — Two real palettes: MongoDB's brand system and Robinhood's brand system put Blue beside #4efd91, 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
- **Crimson** #dc143c [pool] — Crimson is paired with #4efd91 in two real palettes: Wise's brand system and Formula 1's brand system, as the accent. Seen in: Wise (https://brandsweets.com/colors/brands/wise-com), Formula 1 (https://brandsweets.com/colors/brands/formula1-com). — https://brandsweets.com/colors/crimson
- **Lime Green** #32cd32 [pool] — Two real palettes: Duolingo's brand system and Monster Energy's brand system put Lime Green beside #4efd91, as the lead colour. Seen in: Duolingo (https://brandsweets.com/colors/brands/duolingo), Monster Energy (https://brandsweets.com/colors/brands/monsterenergy-com). — https://brandsweets.com/colors/limegreen

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

- On white (#ffffff): 1.33:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #018835 (4.59:1); AA: background → #636363 (4.52:1); AAA: text → #016527 (7.26:1); AAA: background → #454545 (7.21:1)
- On black (#000000): 15.78:1 — 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/4efd91-a2beb0-c859d4-1f2d2b-eaf1e9?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: "#4efd91" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.