Color

#3fa12b

#3fa12b
hex#3fa12b
rgbrgb(63, 161, 43)
hslhsl(110, 58%, 40%)
oklchoklch(0.627 0.179 140.6)
Closest name: Grass Is Greener (#3f9b0b)Relative luminance 0.2672

Colors that go with #3fa12b

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 →

#8d2ba1

#7aa12b · #2ba152

#2b3fa1 · #a12b3f

Split-complementary

Open in tool →

#522ba1 · #a12b7a

#2b7aa1 · #8d2ba1 · #a1522b

Contrast

#3fa12b as textRatioAAAA largeAAAFix
Aaon white
3.31:1failpassfail
  • AA: use #348523 as the text (4.64:1)
  • AAA: use #27651b as the text (7.09:1)
  • AA: or shift the background to #262626 (4.57:1)
Aaon black
6.34:1passpassfail
  • AAA: use #43ad2e as the text (7.26:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3fa12b 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 #3fa12b
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 #3fa12b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fa12b-a3bea2-814edf-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