Color

#eff3f5

#eff3f5
hex#eff3f5
rgbrgb(239, 243, 245)
hslhsl(200, 23%, 95%)
oklchoklch(0.962 0.005 228.8)
Closest name: Anti-Flash White (#f2f3f4)Relative luminance 0.8904

Tints & shades

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

Harmonies

Complementary

Open in tool →

#f5f1ef

#eff5f4 · #eff0f5

#f5eff3 · #f3f5ef

Split-complementary

Open in tool →

#f5eff0 · #f5f4ef

#f4eff5 · #f5f1ef · #f0f5ef

Contrast

#eff3f5 as textRatioAAAA largeAAAFix
Aaon white
1.12:1failfailfail
  • AA: use #56798a as the text (4.67:1)
  • AAA: use #415b68 as the text (7.19:1)
  • AA: or shift the background to #6e6e6e (4.57:1)
  • AAA: or shift the background to #4f4f4f (7.34:1)
Aaon black
18.81:1passpasspassPasses 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 #eff3f5 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#eff3f5 reads as cool, muted, light. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #eff3f5
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 #eff3f5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/eff3f5-9cb2c4-df4e64-1f232d-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