Color

#f3fafb

#f3fafb
hex#f3fafb
rgbrgb(243, 250, 251)
hslhsl(187, 50%, 97%)
oklchoklch(0.98 0.008 207.1)
Closest name: Cold White (#edfcfb)Relative luminance 0.9439

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fbf4f4

#f4fbf8 · #f4f6fb

#fbf4fa · #fafbf4

Split-complementary

Open in tool →

#fbf4f6 · #fbf8f4

#f8f4fb · #fbf4f4 · #f6fbf4

Contrast

#f3fafb as textRatioAAAA largeAAAFix
Aaon white
1.06:1failfailfail
  • AA: use #2e7f8a as the text (4.65:1)
  • AAA: use #225f67 as the text (7.24:1)
  • AA: or shift the background to #707070 (4.69:1)
  • AAA: or shift the background to #545454 (7.17:1)
Aaon black
19.88:1passpasspassPasses 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 #f3fafb as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#f3fafb reads as cool, light, clean. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #f3fafb
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 #f3fafb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f3fafb-a2b8be-df4e83-1f262d-e9f1ee?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