# #428c17

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

## Values

- Hex: `#428c17`
- RGB: rgb(66, 140, 23)
- HSL: hsl(98, 72%, 32%)
- OKLCH: oklch(0.57 0.163 137.2)
- Relative luminance: 0.1998
- Nearest named color: Forest Green (#228b22, Δ 2.156) — https://brandsweets.com/colors/forestgreen
- Moods: vivid
- Page: https://brandsweets.com/colors/428c17

## Tints & shades

- Tints (toward white): #50ab1c, #5dc520, #6ddd2c, #7fe147, #95e665, #aaeb84, #bcef9f, #d1f4bd, #e4f9d8, #f9fef6
- Shades (toward black): #3c7f15, #367213, #316911, #2b5c0f, #254f0d, #1f420b, #193509, #152c07, #0e1f05, #081203

## Harmonies

- Complementary: #61178c
- Analogous: #7d8c17, #178c27
- Triadic: #17428c, #8c1742
- Split-complementary: #27178c, #8c177d
- Tetradic: #177d8c, #61178c, #8c2717

## Colors that go with #428c17

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

- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #428c17 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Coinbase (https://brandsweets.com/colors/brands/coinbase), Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), Netflix (https://brandsweets.com/colors/brands/netflix), DuckDuckGo (https://brandsweets.com/colors/brands/duckduckgo-com). — https://brandsweets.com/colors/crimson
- **Royal Blue** #4169e1 [harmony, pool: triadic] — Royal Blue completes a triad with #428c17 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Xbox (https://brandsweets.com/colors/brands/xbox-com), Console Light (https://brandsweets.com/palettes/technical#console-light), Telehealth (https://brandsweets.com/palettes/modern#telehealth), Coinbase (https://brandsweets.com/colors/brands/coinbase). — https://brandsweets.com/colors/royalblue
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #428c17: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Zendesk (https://brandsweets.com/colors/brands/zendesk-com). — https://brandsweets.com/colors/charcoal
- **Denim** #1560bd [pool] — Designers have shipped Denim with #428c17: 5 real palettes, including Xbox's brand system and Intel's brand system, as the supporting colour. Seen in: Xbox (https://brandsweets.com/colors/brands/xbox-com), Intel (https://brandsweets.com/colors/brands/intel-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/denim
- **Taupe** #483c32 [pool] — Taupe is paired with #428c17 in 8 real palettes, including Instacart's brand system and Acer's brand system, as the lead colour. Seen in: Instacart (https://brandsweets.com/colors/brands/instacart-com), Acer (https://brandsweets.com/colors/brands/acer-com), Subaru (https://brandsweets.com/colors/brands/subaru-com), Wellness (https://brandsweets.com/palettes/warm#wellness). — https://brandsweets.com/colors/taupe
- **Dark Orchid** #9932cc [harmony: complementary] — Dark Orchid sits directly opposite #428c17 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/darkorchid
- **Medium Violet Red** #c71585 [harmony, pool: split] — Medium Violet Red is a split-complement of #428c17: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Bun (https://brandsweets.com/colors/brands/bun-sh). — https://brandsweets.com/colors/mediumvioletred
- **Medium Slate Blue** #7b68ee [harmony, pool: split] — Medium Slate Blue is a split-complement of #428c17: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Clerk (https://brandsweets.com/colors/brands/clerk-com). — https://brandsweets.com/colors/mediumslateblue

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

- On white (#ffffff): 4.2:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #3e8415 (4.65:1); AA: background → #0f0f0f (4.56:1); AAA: text → #2f6510 (7.02:1)
- On black (#000000): 5:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #50ab1c (7.18:1)

## Brands using this color

- **Shake Shack** — accent #418613 (Δ 1.785) — https://brandsweets.com/colors/brands/shakeshack-com

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/428c17-a9bea2-644edf-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: "#428c17" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.