Color

#3ddf11

#3ddf11
hex#3ddf11
rgbrgb(61, 223, 17)
hslhsl(107, 86%, 47%)
oklchoklch(0.79 0.255 140.9)
Closest name: Alarming Slime (#2ce335)Relative luminance 0.5381

Colors that go with #3ddf11

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 →

#b211df

#a5df11 · #11df4b

#113ddf · #df113d

Split-complementary

Open in tool →

#4b11df · #df11a5

#11a5df · #b211df · #df4b11

Contrast

#3ddf11 as textRatioAAAA largeAAAFix
Aaon white
1.79:1failfailfail
  • AA: use #25850a as the text (4.73:1)
  • AAA: use #1b6407 as the text (7.31:1)
  • AA: or shift the background to #4f4f4f (4.59:1)
  • AAA: or shift the background to #333333 (7.08:1)
Aaon black
11.76:1passpasspassPasses 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 #3ddf11 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 #3ddf11
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 #3ddf11 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3ddf11-a5bea2-7a4edf-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