Color

#428f59

#428f59
hex#428f59
rgbrgb(66, 143, 89)
hslhsl(138, 37%, 41%)
oklchoklch(0.587 0.113 151.2)
Closest name: Illuminati Green (#419168)Relative luminance 0.2152

Colors that go with #428f59

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 →

#8f4278

#518f42 · #428f80

#59428f · #8f5942

Split-complementary

Open in tool →

#80428f · #8f4251

#42518f · #8f4278 · #8f8042

Contrast

#428f59 as textRatioAAAA largeAAAFix
Aaon white
3.96:1failpassfail
  • AA: use #3b8150 as the text (4.73:1)
  • AAA: use #2d623d as the text (7.18:1)
  • AA: or shift the background to #171717 (4.53:1)
Aaon black
5.3:1passpassfail
  • AAA: use #4da868 as the text (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #428f59 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 #428f59
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 #428f59 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/428f59-a2beae-be59d4-1f2d29-ebf1e9?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