# #428f4d

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

## Values

- Hex: `#428f4d`
- RGB: rgb(66, 143, 77)
- HSL: hsl(129, 37%, 41%)
- OKLCH: oklch(0.584 0.125 146.7)
- Relative luminance: 0.2134
- Nearest named color: Fern (#548d44, Δ 1.678) — https://brandsweets.com/colors/fern
- Moods: neutral
- Page: https://brandsweets.com/colors/428f4d

## Tints & shades

- Tints (toward white): #4ca459, #57b265, #6cbc78, #81c58b, #96cf9f, #a8d7af, #bde0c2, #d2ead5, #e3f2e5, #f8fcf9
- Shades (toward black): #3b8146, #377740, #306939, #2a5b31, #25502b, #1f4224, #18341c, #122615, #0d1c0f, #060e08

## Harmonies

- Complementary: #8f4284
- Analogous: #5d8f42, #428f74
- Triadic: #4d428f, #8f4d42
- Split-complementary: #74428f, #8f425d
- Tetradic: #425d8f, #8f4284, #8f7442

## Colors that go with #428f4d

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

- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #428f4d: 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), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool), Coastal (https://brandsweets.com/palettes/cool#coastal). — https://brandsweets.com/colors/charcoal
- **Royal Blue** #4169e1 [harmony, pool: triadic] — Royal Blue completes a triad with #428f4d — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Subaru (https://brandsweets.com/colors/brands/subaru-com), Coinbase (https://brandsweets.com/colors/brands/coinbase), Console Light (https://brandsweets.com/palettes/technical#console-light), Telehealth (https://brandsweets.com/palettes/modern#telehealth). — https://brandsweets.com/colors/royalblue
- **Copper** #b87333 [pool] — Designers have shipped Copper with #428f4d: 4 real palettes, including Wellness and Clean Beauty, as the supporting colour. Seen in: Wellness (https://brandsweets.com/palettes/warm#wellness), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Riverbed (https://brandsweets.com/palettes/muted#riverbed), Clay & Linen (https://brandsweets.com/palettes/warm#clay-and-linen). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #428f4d in 7 real palettes, including Five Guys's brand system and Netflix's brand system, as the supporting colour. Seen in: Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), Netflix (https://brandsweets.com/colors/brands/netflix), Coinbase (https://brandsweets.com/colors/brands/coinbase), Diner (https://brandsweets.com/palettes/vivid#diner). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #428f4d: 6 real palettes, including Intel's brand system and Jack Daniel's's brand system, as the supporting colour. Seen in: 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), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 4 real palettes, including Paramount+'s brand system and Telehealth put Midnight Blue beside #428f4d, as the supporting colour. Seen in: Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com), Telehealth (https://brandsweets.com/palettes/modern#telehealth), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Tide Pool (https://brandsweets.com/palettes/cool#tide-pool). — https://brandsweets.com/colors/midnightblue
- **Taupe** #483c32 [pool] — Taupe is paired with #428f4d in 12 real palettes, including Subaru's brand system and Wellness, as that palette's text colour. Seen in: Subaru (https://brandsweets.com/colors/brands/subaru-com), Wellness (https://brandsweets.com/palettes/warm#wellness), Acer (https://brandsweets.com/colors/brands/acer-com), Instacart (https://brandsweets.com/colors/brands/instacart-com). — https://brandsweets.com/colors/taupe
- **Medium Orchid** #ba55d3 [harmony: complementary] — Medium Orchid sits directly opposite #428f4d 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/mediumorchid

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

- On white (#ffffff): 3.99:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #3d8548 (4.52:1); AA: background → #141414 (4.62:1); AAA: text → #2d6235 (7.22:1)
- On black (#000000): 5.27:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #4da85b (7.07:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/428f4d-a2bea9-ae4edf-1f2d27-ecf1e9?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: "#428f4d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.