Color

#3fa42d

#3fa42d
hex#3fa42d
rgbrgb(63, 164, 45)
hslhsl(111, 57%, 41%)
oklchoklch(0.636 0.181 140.9)
Closest name: Fennel Fiasco (#00aa44)Relative luminance 0.278

Colors that go with #3fa42d

Blue, Dodger Blue and Royal 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 →

#922da4

#7aa42d · #2da457

#2d3fa4 · #a42d3f

Split-complementary

Open in tool →

#572da4 · #a42d7a

#2d7aa4 · #922da4 · #a4572d

Contrast

#3fa42d as textRatioAAAA largeAAAFix
Aaon white
3.2:1failpassfail
  • AA: use #338424 as the text (4.7:1)
  • AAA: use #26641b as the text (7.19:1)
  • AA: or shift the background to #292929 (4.54:1)
Aaon black
6.56:1passpassfail
  • AAA: use #42ac2f 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 #3fa42d 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 #3fa42d
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 #3fa42d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fa42d-a3bea2-834edf-1f2d23-eef1e9?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