Color

#3fdb24

#3fdb24
hex#3fdb24
rgbrgb(63, 219, 36)
hslhsl(111, 72%, 50%)
oklchoklch(0.78 0.246 141.3)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.5185

Colors that go with #3fdb24

Deep Sky Blue, Taupe and Violet 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 →

#c024db

#9bdb24 · #24db64

#243fdb · #db243f

Split-complementary

Open in tool →

#6424db · #db249b

#249bdb · #c024db · #db6424

Contrast

#3fdb24 as textRatioAAAA largeAAAFix
Aaon white
1.85:1failfailfail
  • AA: use #278816 as the text (4.55:1)
  • AAA: use #1d6510 as the text (7.19:1)
  • AA: or shift the background to #4d4d4d (4.58:1)
  • AAA: or shift the background to #303030 (7.15:1)
Aaon black
11.37:1passpasspassPasses 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 #3fdb24 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 #3fdb24
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 #3fdb24 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fdb24-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