Color

#f3f7fb

#f3f7fb
hex#f3f7fb
rgbrgb(243, 247, 251)
hslhsl(210, 50%, 97%)
oklchoklch(0.974 0.007 247.9)
Closest name: Cotton Ball (#f2f7fd)Relative luminance 0.9254

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fbf7f4

#f4fbfb · #f4f4fb

#fbf4f7 · #f7fbf4

Split-complementary

Open in tool →

#fbf4f4 · #fbfbf4

#fbf4fb · #fbf7f4 · #f4fbf4

Contrast

#f3f7fb as textRatioAAAA largeAAAFix
Aaon white
1.08:1failfailfail
  • AA: use #3c78b4 as the text (4.63:1)
  • AAA: use #2d5986 as the text (7.28:1)
  • AA: or shift the background to #707070 (4.6:1)
  • AAA: or shift the background to #545454 (7.03:1)
Aaon black
19.51:1passpasspassPasses 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 #f3f7fb as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#f3f7fb reads as cool, light, clean. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #f3f7fb
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 #f3f7fb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f3f7fb-9cabc4-df514e-1f202d-e9f1f1?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