Color

#428f4b

#428f4b
hex#428f4b
rgbrgb(66, 143, 75)
hslhsl(127, 37%, 41%)
oklchoklch(0.584 0.127 146.1)
Closest name: Fern (#548d44)Relative luminance 0.2131

Colors that go with #428f4b

Charcoal, Royal Blue and Copper lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#8f4286

#608f42 · #428f72

#4b428f · #8f4b42

Split-complementary

Open in tool →

#72428f · #8f4260

#42608f · #8f4286 · #8f7242

Contrast

#428f4b as textRatioAAAA largeAAAFix
Aaon white
3.99:1failpassfail
  • AA: use #3d8545 as the text (4.53:1)
  • AAA: use #2d6233 as the text (7.23:1)
  • AA: or shift the background to #141414 (4.62:1)
Aaon black
5.26:1passpassfail
  • AAA: use #4da858 as the text (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #428f4b as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #428f4b
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #428f4b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/428f4b-a2bea8-aa4edf-1f2d27-ecf1e9?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md