# #66d237

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

## Values

- Hex: `#66d237`
- RGB: rgb(102, 210, 55)
- HSL: hsl(102, 63%, 52%)
- OKLCH: oklch(0.77 0.213 138.1)
- Relative luminance: 0.4919
- Nearest named color: Blinking Terminal (#66cc00, Δ 2.202) — https://brandsweets.com/colors/blinking-terminal
- Moods: vivid
- Page: https://brandsweets.com/colors/66d237

## Tints & shades

- Tints (toward white): #76d64c, #82da5d, #92df72, #9fe382, #afe797, #bfecac, #ccf0bc, #dcf5d1, #e9f8e2, #f9fdf7
- Shades (toward black): #5ac32c, #50af28, #489e24, #3f891f, #35741a, #2c6016, #224b11, #1b3a0d, #112508, #081104

## Harmonies

- Complementary: #a337d2
- Analogous: #b3d237, #37d256
- Triadic: #3766d2, #d23766
- Split-complementary: #5637d2, #d237b3
- Tetradic: #37b3d2, #a337d2, #d25637

## Colors that go with #66d237

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

- **Blue** #0000ff [pool] — 4 real palettes, including Minecraft's brand system and MongoDB's brand system put Blue beside #66d237, as the accent. Seen in: Minecraft (https://brandsweets.com/colors/brands/minecraft-net), MongoDB (https://brandsweets.com/colors/brands/mongodb-com), Spotify (https://brandsweets.com/colors/brands/spotify), Unity (https://brandsweets.com/colors/brands/unity-com). — https://brandsweets.com/colors/blue
- **Deep Sky Blue** #00bfff [harmony, pool: triadic] — Deep Sky Blue completes a triad with #66d237 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Learning App (https://brandsweets.com/palettes/playful#learning-app), Remix (https://brandsweets.com/colors/brands/remix-run), Prime Video (https://brandsweets.com/colors/brands/primevideo-com). — https://brandsweets.com/colors/deepskyblue
- **Taupe** #483c32 [pool] — Taupe is paired with #66d237 in 8 real palettes, including Minecraft's brand system and WhatsApp's brand system, as the lead colour. Seen in: Minecraft (https://brandsweets.com/colors/brands/minecraft-net), WhatsApp (https://brandsweets.com/colors/brands/whatsapp-com), Acer (https://brandsweets.com/colors/brands/acer-com), Citrus Grove (https://brandsweets.com/palettes/warm#citrus-grove). — https://brandsweets.com/colors/taupe
- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #66d237 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, pool: split] — Hot Pink is a split-complement of #66d237: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Terminal (https://brandsweets.com/palettes/technical#terminal). — https://brandsweets.com/colors/hotpink
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #66d237: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com). — https://brandsweets.com/colors/charcoal
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #66d237 in 3 real palettes, including 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), Playground (https://brandsweets.com/palettes/bold#playground). — https://brandsweets.com/colors/darkorange
- **Mustard Yellow** #ffdb58 [pool] — 3 real palettes, including Citrus Grove and Meadow put Mustard Yellow beside #66d237, as the accent. Seen in: Citrus Grove (https://brandsweets.com/palettes/warm#citrus-grove), Meadow (https://brandsweets.com/palettes/light#meadow), Fresh Juice (https://brandsweets.com/palettes/playful#fresh-juice). — https://brandsweets.com/colors/mustard

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

- On white (#ffffff): 1.94:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #3d851e (4.59:1); AA: background → #4a4a4a (4.57:1); AAA: text → #2e6417 (7.12:1); AAA: background → #2e2e2e (7.01:1)
- On black (#000000): 10.84:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Monster Energy** — accent #6bd41a (Δ 1.523) — https://brandsweets.com/colors/brands/monsterenergy-com

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/66d237-a7bea2-6e4edf-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: "#66d237" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.