Color

#ecfe4d

#ecfe4d
hex#ecfe4d
rgbrgb(236, 254, 77)
hslhsl(66, 99%, 65%)
oklchoklch(0.954 0.192 115.2)
Closest name: Biohazard Suit (#fbfb4c)Relative luminance 0.8925

Colors that go with #ecfe4d

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 →

#5f4dfe

#feb74d · #94fe4d

#4decfe · #fe4dec

Split-complementary

Open in tool →

#4d94fe · #b74dfe

#4dfeb7 · #5f4dfe · #fe4d94

Contrast

#ecfe4d as textRatioAAAA largeAAAFix
Aaon white
1.11:1failfailfail
  • AA: use #6e7a01 as the text (4.72:1)
  • AAA: use #525b00 as the text (7.35:1)
  • AA: or shift the background to #6e6e6e (4.58:1)
  • AAA: or shift the background to #525252 (7.01:1)
Aaon black
18.85:1passpasspassPasses 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 #ecfe4d 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 #ecfe4d
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 #ecfe4d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ecfe4d-b8bea2-4e86df-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