Color

#509d39

#509d39
hex#509d39
rgbrgb(80, 157, 57)
hslhsl(106, 47%, 42%)
oklchoklch(0.625 0.156 139.2)
Closest name: Golf Course (#5a9e4b)Relative luminance 0.2611

Colors that go with #509d39

Charcoal, Blue and Crimson 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 →

#86399d

#839d39 · #399d54

#39509d · #9d3950

Split-complementary

Open in tool →

#54399d · #9d3983

#39839d · #86399d · #9d5439

Contrast

#509d39 as textRatioAAAA largeAAAFix
Aaon white
3.37:1failpassfail
  • AA: use #43832f as the text (4.64:1)
  • AAA: use #326123 as the text (7.32:1)
  • AA: or shift the background to #242424 (4.6:1)
Aaon black
6.22:1passpassfail
  • AAA: use #56a93d as the text (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #509d39 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 #509d39
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 #509d39 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/509d39-a5bea2-774edf-1f2d22-eff1e9?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