Color

#eff6fb

#eff6fb
hex#eff6fb
rgbrgb(239, 246, 251)
hslhsl(205, 60%, 96%)
oklchoklch(0.969 0.01 238.5)
Closest name: Cotton Ball (#f2f7fd)Relative luminance 0.9123

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fbf4ef

#effbfa · #eff0fb

#fbeff6 · #f6fbef

Split-complementary

Open in tool →

#fbeff0 · #fbfaef

#faeffb · #fbf4ef · #f0fbef

Contrast

#eff6fb as textRatioAAAA largeAAAFix
Aaon white
1.09:1failfailfail
  • AA: use #2d7bb4 as the text (4.56:1)
  • AAA: use #225d87 as the text (7.04:1)
  • AA: or shift the background to #707070 (4.54:1)
  • AAA: or shift the background to #525252 (7.16:1)
Aaon black
19.25:1passpasspassPasses 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 #eff6fb as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#eff6fb reads as cool, vivid, light. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #eff6fb
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #eff6fb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/eff6fb-9cafc4-df4e58-1f212d-e9f1f0?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