Color

#728a9d

#728a9d
hex#728a9d
rgbrgb(114, 138, 157)
hslhsl(207, 18%, 53%)
oklchoklch(0.621 0.04 242.2)
Closest name: lightslategray (#778899)Relative luminance 0.2419

Colors that go with #728a9d

Charcoal, Copper and Champagne 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 →

#9d8572

#729d9b · #72749d

#9d7289 · #899d72

Split-complementary

Open in tool →

#9d7274 · #9d9b72

#9b729d · #9d8572 · #749d72

Contrast

#728a9d as textRatioAAAA largeAAAFix
Aaon white
3.6:1failpassfail
  • AA: use #60778a as the text (4.66:1)
  • AAA: use #495b69 as the text (7.04:1)
  • AA: or shift the background to #1f1f1f (4.58:1)
Aaon black
5.84:1passpassfail
  • AAA: use #8498a9 as the text (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #728a9d as the background.

Brands using this color

Palettes built around it

mcpConnect your agent — build around #728a9d
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 #728a9d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/728a9d-9cadc4-df4e53-1f212d-e9f1f1?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