Color

#e1fb18

#e1fb18
hex#e1fb18
rgbrgb(225, 251, 24)
hslhsl(67, 97%, 54%)
oklchoklch(0.937 0.213 117.2)
Closest name: Banana Flash (#eefe02)Relative luminance 0.8507

Colors that go with #e1fb18

Blue, Crimson and Red 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 →

#3218fb

#fba418 · #6ffb18

#18e1fb · #fb18e1

Split-complementary

Open in tool →

#186ffb · #a418fb

#18fba4 · #3218fb · #fb186f

Contrast

#e1fb18 as textRatioAAAA largeAAAFix
Aaon white
1.17:1failfailfail
  • AA: use #6f7e02 as the text (4.51:1)
  • AAA: use #505a01 as the text (7.49:1)
  • AA: or shift the background to #6b6b6b (4.57:1)
  • AAA: or shift the background to #4f4f4f (7.03:1)
Aaon black
18.01:1passpasspassPasses 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 #e1fb18 as the background.

Brands using this color

mcpConnect your agent — build around #e1fb18
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 #e1fb18 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/e1fb18-b8bea2-4e83df-262d1f-f1eee9?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