Color

#3fc412

#3fc412
hex#3fc412
rgbrgb(63, 196, 18)
hslhsl(105, 83%, 42%)
oklchoklch(0.72 0.227 140.2)
Closest name: Crude Banana (#21c40e)Relative luminance 0.4058

Colors that go with #3fc412

Blue, Charcoal 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 →

#9812c4

#98c412 · #12c43f

#123fc4 · #c4123f

Split-complementary

Open in tool →

#3f12c4 · #c41298

#1298c4 · #9812c4 · #c43f12

Contrast

#3fc412 as textRatioAAAA largeAAAFix
Aaon white
2.3:1failfailfail
  • AA: use #2b870d as the text (4.59:1)
  • AAA: use #1f6209 as the text (7.48:1)
  • AA: or shift the background to #404040 (4.5:1)
  • AAA: or shift the background to #1f1f1f (7.16:1)
Aaon black
9.12:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3fc412 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 #3fc412
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 #3fc412 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fc412-a6bea2-754edf-1f2d22-eff1e9?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