Color

#40f83a

#40f83a
hex#40f83a
rgbrgb(64, 248, 58)
hslhsl(118, 93%, 60%)
oklchoklch(0.856 0.266 142.5)
Closest name: Cathode Green (#00ff55)Relative luminance 0.6853

Colors that go with #40f83a

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 →

#f23af8

#9ff83a · #3af893

#3a40f8 · #f83a40

Split-complementary

Open in tool →

#933af8 · #f83a9f

#3a9ff8 · #f23af8 · #f8933a

Contrast

#40f83a as textRatioAAAA largeAAAFix
Aaon white
1.43:1failfailfail
  • AA: use #098a05 as the text (4.52:1)
  • AAA: use #076704 as the text (7.12:1)
  • AA: or shift the background to #5e5e5e (4.54:1)
  • AAA: or shift the background to #424242 (7.04:1)
Aaon black
14.71:1passpasspassPasses 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 #40f83a 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 #40f83a
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 #40f83a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40f83a-a2bea4-944edf-1f2d25-edf1e9?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