Color

#399d41

#399d41
hex#399d41
rgbrgb(57, 157, 65)
hslhsl(125, 47%, 42%)
oklchoklch(0.617 0.16 144.6)
Closest name: Green Revolution (#009944)Relative luminance 0.2537

Colors that go with #399d41

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 →

#9d3995

#639d39 · #399d73

#41399d · #9d4139

Split-complementary

Open in tool →

#73399d · #9d3963

#39639d · #9d3995 · #9d7339

Contrast

#399d41 as textRatioAAAA largeAAAFix
Aaon white
3.46:1failpassfail
  • AA: use #318738 as the text (4.51:1)
  • AAA: use #24652a as the text (7.07:1)
  • AA: or shift the background to #212121 (4.66:1)
Aaon black
6.07:1passpassfail
  • AAA: use #3eac47 as the text (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #399d41 as the background.

Brands using this color

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

Palettes built around it

mcpConnect your agent — build around #399d41
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 #399d41 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/399d41-a2bea7-a54edf-1f2d26-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