# #91ef57

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

## Values

- Hex: `#91ef57`
- RGB: rgb(145, 239, 87)
- HSL: hsl(97, 83%, 64%)
- OKLCH: oklch(0.863 0.207 135.6)
- Relative luminance: 0.6844
- Nearest named color: Herbivore (#88ee77, Δ 2.94) — https://brandsweets.com/colors/herbivore
- Moods: vivid
- Page: https://brandsweets.com/colors/91ef57

## Tints & shades

- Tints (toward white): #9bf165, #a7f278, #b0f486, #bcf598, #c5f7a6, #cef8b4, #dafac7, #e4fbd5, #f0fde8, #f9fef6
- Shades (toward black): #7fed3b, #6dea1f, #5fd714, #52bb11, #469f0f, #3a830c, #2d670a, #214b07, #152f04, #081302

## Harmonies

- Complementary: #b557ef
- Analogous: #deef57, #57ef69
- Triadic: #5791ef, #ef5791
- Split-complementary: #6957ef, #ef57de
- Tetradic: #57deef, #b557ef, #ef6957

## Colors that go with #91ef57

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, pool: complementary] — Violet sits directly opposite #91ef57 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Gumroad (https://brandsweets.com/colors/brands/gumroad-com). — https://brandsweets.com/colors/violet
- **Deep Sky Blue** #00bfff [harmony, pool: triadic] — Deep Sky Blue completes a triad with #91ef57 — 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), Prime Video (https://brandsweets.com/colors/brands/primevideo-com), Learning App (https://brandsweets.com/palettes/playful#learning-app). — https://brandsweets.com/colors/deepskyblue
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #91ef57: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Zendesk (https://brandsweets.com/colors/brands/zendesk-com). — https://brandsweets.com/colors/charcoal
- **Hot Pink** #ff69b4 [harmony: split] — Hot Pink is a split-complement of #91ef57: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/hotpink
- **Lilac** #c8a2c8 [harmony: split] — Lilac is a split-complement of #91ef57: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/lilac
- **Blue** #0000ff [pool] — Two real palettes: MongoDB's brand system and Robinhood's brand system put Blue beside #91ef57, 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
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #91ef57 in two real palettes: Learning App and Citrus Grove, as the accent. Seen in: Learning App (https://brandsweets.com/palettes/playful#learning-app), Citrus Grove (https://brandsweets.com/palettes/warm#citrus-grove). — https://brandsweets.com/colors/darkorange
- **Lime Green** #32cd32 [pool] — Two real palettes: Duolingo's brand system and Monster Energy's brand system put Lime Green beside #91ef57, 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): 1.43:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #3c870d (4.5:1); AA: background → #5e5e5e (4.54:1); AAA: text → #2b6209 (7.36:1); AAA: background → #424242 (7.03:1)
- On black (#000000): 14.69:1 — 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/91ef57-a9bea2-624edf-1f2d20-f0f1e9?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: "#91ef57" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.