Color

#3df599

#3df599
hex#3df599
rgbrgb(61, 245, 153)
hslhsl(150, 90%, 60%)
oklchoklch(0.86 0.193 155.8)
Closest name: mediumspringgreen (#00fa9a)Relative luminance 0.686

Colors that go with #3df599

Violet, Charcoal and Deep Sky 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 →

#f53d99

#3df53d · #3df5f5

#993df5 · #f5993d

Split-complementary

Open in tool →

#f53df5 · #f53d3d

#3d3df5 · #f53d99 · #f5f53d

Contrast

#3df599 as textRatioAAAA largeAAAFix
Aaon white
1.43:1failfailfail
  • AA: use #078847 as the text (4.54:1)
  • AAA: use #056636 as the text (7.09:1)
  • AA: or shift the background to #5e5e5e (4.54:1)
  • AAA: or shift the background to #424242 (7.04:1)
Aaon black
14.72:1passpasspassPasses 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 #3df599 as the background.

Brands using this color

mcpConnect your agent — build around #3df599
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 #3df599 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3df599-a2beb3-d459d2-1f2d2c-e9f1ea?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