Color

#f3f6fb

#f3f6fb
hex#f3f6fb
rgbrgb(243, 246, 251)
hslhsl(217, 50%, 97%)
oklchoklch(0.972 0.007 260.7)
Closest name: Cotton Ball (#f2f7fd)Relative luminance 0.9193

Colors that go with #f3f6fb

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 #f3f6fb

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fbf8f4

#f4fafb · #f4f4fb

#fbf4f6 · #f6fbf4

Split-complementary

Open in tool →

#fbf4f4 · #fafbf4

#fbf4fa · #fbf8f4 · #f4fbf4

Contrast

#f3f6fb as textRatioAAAA largeAAAFix
Aaon white
1.08:1failfailfail
  • AA: use #4776c2 as the text (4.53:1)
  • AAA: use #325895 as the text (7.08:1)
  • AA: or shift the background to #707070 (4.57:1)
  • AAA: or shift the background to #525252 (7.21:1)
Aaon black
19.39:1passpasspassPasses 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 #f3f6fb as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#f3f6fb reads as cool, light, clean. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #f3f6fb
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 #f3f6fb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f3f6fb-9ca7c4-df624e-201f2d-e9f0f1?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