Color

#9efc40

#9efc40
hex#9efc40
rgbrgb(158, 252, 64)
hslhsl(90, 97%, 62%)
oklchoklch(0.899 0.23 133)
Closest name: greenyellow (#adff2f)Relative luminance 0.7726

Colors that go with #9efc40

Violet, Blue and Charcoal 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 →

#9e40fc

#fcfc40 · #40fc40

#409efc · #fc409e

Split-complementary

Open in tool →

#4040fc · #fc40fc

#40fcfc · #9e40fc · #fc4040

Contrast

#9efc40 as textRatioAAAA largeAAAFix
Aaon white
1.28:1failfailfail
  • AA: use #428302 as the text (4.69:1)
  • AAA: use #336402 as the text (7.08:1)
  • AA: or shift the background to #636363 (4.71:1)
  • AAA: or shift the background to #474747 (7.28:1)
Aaon black
16.45:1passpasspassPasses 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 #9efc40 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 #9efc40
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 #9efc40 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/9efc40-adbea2-514edf-202d1f-f1f1e9?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