Color

#399d3a

#399d3a
hex#399d3a
rgbrgb(57, 157, 58)
hslhsl(121, 47%, 42%)
oklchoklch(0.616 0.166 143.4)
Closest name: Grass Is Greener (#3f9b0b)Relative luminance 0.2529

Colors that go with #399d3a

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 →

#9d399c

#699d39 · #399d6d

#3a399d · #9d3a39

Split-complementary

Open in tool →

#6d399d · #9d3969

#39699d · #9d399c · #9d6d39

Contrast

#399d3a as textRatioAAAA largeAAAFix
Aaon white
3.47:1failpassfail
  • AA: use #318732 as the text (4.52:1)
  • AAA: use #246526 as the text (7.08:1)
  • AA: or shift the background to #212121 (4.64:1)
Aaon black
6.06:1passpassfail
  • AAA: use #3eac40 as the text (7.18:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #399d3a 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 #399d3a
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 #399d3a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/399d3a-a2bea6-9b4edf-1f2d26-edf1e9?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