Color

#b9d1ef

#b9d1ef
hex#b9d1ef
rgbrgb(185, 209, 239)
hslhsl(213, 63%, 83%)
oklchoklch(0.853 0.049 254.1)
Closest name: Frozen Periwinkle (#c9d1ef)Relative luminance 0.6215

Colors that go with #b9d1ef

Charcoal, Deep Sky Blue and Goldenrod 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#efd6b8

#b8ecef · #bbb8ef

#efb8d1 · #d1efb8

Split-complementary

Open in tool →

#efbbb8 · #ecefb8

#efb8ec · #efd6b8 · #b8efbb

Contrast

#b9d1ef as textRatioAAAA largeAAAFix
Aaon white
1.56:1failfailfail
  • AA: use #2e75cc as the text (4.63:1)
  • AAA: use #23589a as the text (7.16:1)
  • AA: or shift the background to #575757 (4.62:1)
  • AAA: or shift the background to #3b3b3b (7.16:1)
Aaon black
13.43:1passpasspassPasses 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 #b9d1ef as the background.

Brands using this color

Fonts for this mood

#b9d1ef reads as cool, vivid, light. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b9d1ef
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 #b9d1ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b9d1ef-9ca9c4-df584e-1f202d-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