Color

#ecf448

#ecf448
hex#ecf448
rgbrgb(236, 244, 72)
hslhsl(63, 89%, 62%)
oklchoklch(0.932 0.184 112.1)
Closest name: Buttercup Glow (#f1f458)Relative luminance 0.83

Colors that go with #ecf448

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 →

#5048f4

#f4a748 · #95f448

#48ecf4 · #f448ec

Split-complementary

Open in tool →

#4895f4 · #a748f4

#48f4a7 · #5048f4 · #f44895

Contrast

#ecf448 as textRatioAAAA largeAAAFix
Aaon white
1.19:1failfailfail
  • AA: use #737807 as the text (4.75:1)
  • AAA: use #575c05 as the text (7.15:1)
  • AA: or shift the background to #696969 (4.6:1)
  • AAA: or shift the background to #4d4d4d (7.08:1)
Aaon black
17.6:1passpasspassPasses 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 #ecf448 as the background.

Brands using this color

mcpConnect your agent — build around #ecf448
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 #ecf448 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ecf448-b9bea2-4e8ddf-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