Color

#e4f245

#e4f245
hex#e4f245
rgbrgb(228, 242, 69)
hslhsl(65, 87%, 61%)
oklchoklch(0.921 0.186 114.1)
Closest name: Buttercup Glow (#f1f458)Relative luminance 0.8043

Colors that go with #e4f245

Plum, 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 →

#5345f2

#f2aa45 · #8df245

#45e4f2 · #f245e4

Split-complementary

Open in tool →

#458df2 · #aa45f2

#45f2aa · #5345f2 · #f2458d

Contrast

#e4f245 as textRatioAAAA largeAAAFix
Aaon white
1.23:1failfailfail
  • AA: use #727c09 as the text (4.56:1)
  • AAA: use #545b06 as the text (7.3:1)
  • AA: or shift the background to #666666 (4.67:1)
  • AAA: or shift the background to #4a4a4a (7.21:1)
Aaon black
17.09:1passpasspassPasses 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 #e4f245 as the background.

Brands using this color

mcpConnect your agent — build around #e4f245
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 #e4f245 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/e4f245-b8bea2-4e88df-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