Color

#effbf3

#effbf3
hex#effbf3
rgbrgb(239, 251, 243)
hslhsl(140, 60%, 96%)
oklchoklch(0.977 0.016 156.9)
Closest name: Cold White (#edfcfb)Relative luminance 0.9382

Colors that go with #effbf3

Charcoal, Amber and Blue 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.

Real palettes that use #effbf3

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#fbeff7

#f1fbef · #effbf9

#f3effb · #fbf3ef

Split-complementary

Open in tool →

#f9effb · #fbeff1

#eff1fb · #fbeff7 · #fbf9ef

Contrast

#effbf3 as textRatioAAAA largeAAAFix
Aaon white
1.06:1failfailfail
  • AA: use #228743 as the text (4.55:1)
  • AAA: use #1a6633 as the text (7.02:1)
  • AA: or shift the background to #707070 (4.66:1)
  • AAA: or shift the background to #545454 (7.13:1)
Aaon black
19.76:1passpasspassPasses 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 #effbf3 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#effbf3 reads as vivid, light, clean. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #effbf3
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 #effbf3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/effbf3-a2beaf-c259d4-1f2d2a-ebf1e9?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