Color

#3ff34e

#3ff34e
hex#3ff34e
rgbrgb(63, 243, 78)
hslhsl(125, 88%, 60%)
oklchoklch(0.845 0.25 144)
Closest name: Becquerel (#4bec13)Relative luminance 0.6571

Colors that go with #3ff34e

Violet, Deep Sky Blue and Hot Pink 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 →

#f33fe4

#8af33f · #3ff3a8

#4e3ff3 · #f34e3f

Split-complementary

Open in tool →

#a83ff3 · #f33f8a

#3f8af3 · #f33fe4 · #f3a83f

Contrast

#3ff34e as textRatioAAAA largeAAAFix
Aaon white
1.48:1failfailfail
  • AA: use #098613 as the text (4.74:1)
  • AAA: use #06650e as the text (7.3:1)
  • AA: or shift the background to #5c5c5c (4.5:1)
  • AAA: or shift the background to #3d3d3d (7.31:1)
Aaon black
14.14:1passpasspassPasses 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 #3ff34e 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 #3ff34e
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 #3ff34e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3ff34e-a2bea7-a54edf-1f2d26-ecf1e9?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