Color

#40fc53

#40fc53
hex#40fc53
rgbrgb(64, 252, 83)
hslhsl(126, 97%, 62%)
oklchoklch(0.868 0.256 144.2)
Closest name: Cathode Green (#00ff55)Relative luminance 0.7134

Colors that go with #40fc53

Violet, Hot Pink 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 →

#fc40e9

#8bfc40 · #40fcb1

#5340fc · #fc5340

Split-complementary

Open in tool →

#b140fc · #fc408b

#408bfc · #fc40e9 · #fcb140

Contrast

#40fc53 as textRatioAAAA largeAAAFix
Aaon white
1.38:1failfailfail
  • AA: use #02880f as the text (4.63:1)
  • AAA: use #02640b as the text (7.42:1)
  • AA: or shift the background to #616161 (4.5:1)
  • AAA: or shift the background to #424242 (7.31:1)
Aaon black
15.27:1passpasspassPasses 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 #40fc53 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 #40fc53
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 #40fc53 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40fc53-a2bea8-a74edf-1f2d27-ecf1e9?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