Color

#3ff104

#3ff104
hex#3ff104
rgbrgb(63, 241, 4)
hslhsl(105, 97%, 48%)
oklchoklch(0.836 0.274 140.9)
Closest name: Becquerel (#4bec13)Relative luminance 0.6398

Colors that go with #3ff104

Deep Sky Blue, Violet 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 →

#b604f1

#b6f104 · #04f13f

#043ff1 · #f1043f

Split-complementary

Open in tool →

#3f04f1 · #f104b6

#04b6f1 · #b604f1 · #f13f04

Contrast

#3ff104 as textRatioAAAA largeAAAFix
Aaon white
1.52:1failfailfail
  • AA: use #238802 as the text (4.57:1)
  • AAA: use #1a6402 as the text (7.32:1)
  • AA: or shift the background to #595959 (4.6:1)
  • AAA: or shift the background to #3d3d3d (7.14:1)
Aaon black
13.8:1passpasspassPasses 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 #3ff104 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 #3ff104
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 #3ff104 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3ff104-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