Color

#c3fd30

#c3fd30
hex#c3fd30
rgbrgb(195, 253, 48)
hslhsl(77, 98%, 59%)
oklchoklch(0.921 0.221 125.3)
Closest name: Chartreuse (#c1f80a)Relative luminance 0.8207

Colors that go with #c3fd30

Crimson, Red and Plum 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 →

#6a30fd

#fdd130 · #5cfd30

#30c3fd · #fd30c3

Split-complementary

Open in tool →

#305cfd · #d130fd

#30fdd1 · #6a30fd · #fd305c

Contrast

#c3fd30 as textRatioAAAA largeAAAFix
Aaon white
1.21:1failfailfail
  • AA: use #5b7e01 as the text (4.74:1)
  • AAA: use #456001 as the text (7.18:1)
  • AA: or shift the background to #696969 (4.55:1)
  • AAA: or shift the background to #4d4d4d (7.01:1)
Aaon black
17.41:1passpasspassPasses 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 #c3fd30 as the background.

Brands using this color

Palettes built around it

mcpConnect your agent — build around #c3fd30
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 #c3fd30 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/c3fd30-b3bea2-4e6bdf-232d1f-f1efe9?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