Color

#4fd40c

#4fd40c
hex#4fd40c
rgbrgb(79, 212, 12)
hslhsl(100, 89%, 44%)
oklchoklch(0.766 0.239 139.1)
Closest name: Blinking Terminal (#66cc00)Relative luminance 0.4878

Colors that go with #4fd40c

Taupe, 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 →

#910cd4

#b3d40c · #0cd42e

#0c4fd4 · #d40c4f

Split-complementary

Open in tool →

#2e0cd4 · #d40cb3

#0cb3d4 · #910cd4 · #d42e0c

Contrast

#4fd40c as textRatioAAAA largeAAAFix
Aaon white
1.95:1failfailfail
  • AA: use #328708 as the text (4.56:1)
  • AAA: use #266506 as the text (7.13:1)
  • AA: or shift the background to #4a4a4a (4.54:1)
  • AAA: or shift the background to #2b2b2b (7.25:1)
Aaon black
10.76:1passpasspassPasses 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 #4fd40c 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 #4fd40c
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 #4fd40c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4fd40c-a8bea2-694edf-1f2d21-f0f1e9?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