Color

#678ea8

#678ea8
hex#678ea8
rgbrgb(103, 142, 168)
hslhsl(204, 27%, 53%)
oklchoklch(0.628 0.058 238.1)
Closest name: Cavolo Nero (#72939e)Relative luminance 0.2506

Colors that go with #678ea8

Charcoal, Copper and Cobalt Blue 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 →

#a88167

#67a8a1 · #676da8

#a8678e · #8ea867

Split-complementary

Open in tool →

#a8676d · #a8a167

#a167a8 · #a88167 · #6da867

Contrast

#678ea8 as textRatioAAAA largeAAAFix
Aaon white
3.49:1failpassfail
  • AA: use #547992 as the text (4.64:1)
  • AAA: use #3f5b6e as the text (7.16:1)
  • AA: or shift the background to #212121 (4.61:1)
Aaon black
6.01:1passpassfail
  • AAA: use #779ab1 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 #678ea8 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 #678ea8
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 #678ea8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/678ea8-9cafc4-df4e5a-1f222d-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