Color

#509e1f

#509e1f
hex#509e1f
rgbrgb(80, 158, 31)
hslhsl(97, 67%, 37%)
oklchoklch(0.625 0.174 136.5)
Closest name: Grass Is Greener (#3f9b0b)Relative luminance 0.2626

Colors that go with #509e1f

Charcoal, Crimson and Blue 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 →

#6d1f9e

#8f9e1f · #1f9e2e

#1f509e · #9e1f50

Split-complementary

Open in tool →

#2e1f9e · #9e1f8f

#1f8f9e · #6d1f9e · #9e2e1f

Contrast

#509e1f as textRatioAAAA largeAAAFix
Aaon white
3.36:1failpassfail
  • AA: use #43841a as the text (4.61:1)
  • AAA: use #316213 as the text (7.27:1)
  • AA: or shift the background to #262626 (4.51:1)
Aaon black
6.25:1passpassfail
  • AAA: use #56aa22 as the text (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #509e1f 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 #509e1f
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 #509e1f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/509e1f-a9bea2-624edf-1f2d20-f0f1e9?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