Color

#678acb

#678acb
hex#678acb
rgbrgb(103, 138, 203)
hslhsl(219, 49%, 60%)
oklchoklch(0.635 0.106 262.2)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2537

Colors that go with #678acb

Charcoal, Copper and Amber 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 →

#cba867

#67bccb · #7667cb

#cb678a · #8acb67

Split-complementary

Open in tool →

#cb7667 · #bccb67

#cb67bc · #cba867 · #67cb76

Contrast

#678acb as textRatioAAAA largeAAAFix
Aaon white
3.46:1failpassfail
  • AA: use #4973c1 as the text (4.66:1)
  • AAA: use #345798 as the text (7.09:1)
  • AA: or shift the background to #212121 (4.66:1)
Aaon black
6.07:1passpassfail
  • AAA: use #7696d0 as the text (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #678acb as the background.

Brands using this color

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

Fonts for this mood

#678acb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #678acb
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 #678acb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/678acb-9ca5c4-df664e-211f2d-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