Color

#878ca1

#878ca1
hex#878ca1
rgbrgb(135, 140, 161)
hslhsl(228, 12%, 58%)
oklchoklch(0.643 0.032 274.9)
Closest name: Cool Gray (#8c92ac)Relative luminance 0.2648

Colors that go with #878ca1

Charcoal, Copper and Denim 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 #878ca1

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a19c87

#8799a1 · #8f87a1

#a1878c · #8ca187

Split-complementary

Open in tool →

#a18f87 · #99a187

#a18799 · #a19c87 · #87a18f

Contrast

#878ca1 as textRatioAAAA largeAAAFix
Aaon white
3.34:1failpassfail
  • AA: use #6e748c as the text (4.63:1)
  • AAA: use #53586a as the text (7.07:1)
  • AA: or shift the background to #262626 (4.54:1)
Aaon black
6.3:1passpassfail
  • AAA: use #9297aa as the text (7.23:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #878ca1 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Palettes built around it

mcpConnect your agent — build around #878ca1
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 #878ca1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/878ca1-9c9fc4-df7c4e-231f2d-e9eff1?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