# #4dd219

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

## Values

- Hex: `#4dd219`
- RGB: rgb(77, 210, 25)
- HSL: hsl(103, 79%, 46%)
- OKLCH: oklch(0.76 0.235 139.5)
- Relative luminance: 0.4774
- Nearest named color: Blinking Terminal (#66cc00, Δ 2.07) — https://brandsweets.com/colors/blinking-terminal
- Moods: vivid
- Page: https://brandsweets.com/colors/4dd219

## Tints & shades

- Tints (toward white): #57e51f, #68e736, #7deb52, #8eed68, #9ff07f, #b0f396, #c1f5ad, #d6f9c8, #e7fbdf, #f8fef6
- Shades (toward black): #46c016, #40ad14, #379712, #318410, #2a720d, #23600b, #1d4e09, #143706, #0d2504, #071202

## Harmonies

- Complementary: #9d19d2
- Analogous: #aad219, #19d241
- Triadic: #194dd2, #d2194d
- Split-complementary: #4119d2, #d219aa
- Tetradic: #19aad2, #9d19d2, #d24119

## Colors that go with #4dd219

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

- **Taupe** #483c32 [pool] — Taupe is paired with #4dd219 in 8 real palettes, including WhatsApp's brand system and Minecraft's brand system, as the supporting colour. Seen in: WhatsApp (https://brandsweets.com/colors/brands/whatsapp-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Acer (https://brandsweets.com/colors/brands/acer-com), Obsidian (https://brandsweets.com/colors/brands/obsidian-md). — https://brandsweets.com/colors/taupe
- **Violet** #ee82ee [harmony: complementary] — Violet sits directly opposite #4dd219 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 #4dd219: 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
- **Blue** #0000ff [pool] — 3 real palettes, including Minecraft's brand system and MongoDB's brand system put Blue beside #4dd219, 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). — https://brandsweets.com/colors/blue
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #4dd219: 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 #4dd219 in 3 real palettes, including Learning App and Playground, as the accent. Seen in: Learning App (https://brandsweets.com/palettes/playful#learning-app), Playground (https://brandsweets.com/palettes/bold#playground), Citrus Grove (https://brandsweets.com/palettes/warm#citrus-grove). — https://brandsweets.com/colors/darkorange
- **Deep Sky Blue** #00bfff [harmony, pool: triadic] — Deep Sky Blue completes a triad with #4dd219 — 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). — https://brandsweets.com/colors/deepskyblue
- **Mustard Yellow** #ffdb58 [pool] — 3 real palettes, including Meadow and Citrus Grove put Mustard Yellow beside #4dd219, as the supporting colour. Seen in: Meadow (https://brandsweets.com/palettes/light#meadow), Citrus Grove (https://brandsweets.com/palettes/warm#citrus-grove), Fresh Juice (https://brandsweets.com/palettes/playful#fresh-juice). — https://brandsweets.com/colors/mustard

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

- On white (#ffffff): 1.99:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #318410 (4.73:1); AA: background → #474747 (4.67:1); AAA: text → #25640c (7.22:1); AAA: background → #2b2b2b (7.11:1)
- On black (#000000): 10.55:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **Duolingo** — primary #58cc02 (Δ 1.596) — https://brandsweets.com/colors/brands/duolingo
- **Duolingo** — secondary #58cc02 (Δ 1.596) — https://brandsweets.com/colors/brands/duolingo

## Curated palettes containing it

- **Learning App** (playful, vivid, friendly) — #58cc02, #1cb0f6, #ff9600, #ffffff, #1c1c1c — Green, blue and orange at full saturation: the gamified-learning look, where every color is a reward. — tool: https://brandsweets.com/palettes/new/58cc02-1cb0f6-ff9600-ffffff-1c1c1c — collection: https://brandsweets.com/palettes/playful

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/4dd219-a6bea2-704edf-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: "#4dd219" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.