Color

#728b9d

#728b9d
hex#728b9d
rgbrgb(114, 139, 157)
hslhsl(205, 18%, 53%)
oklchoklch(0.624 0.039 239.6)
Closest name: lightslategray (#778899)Relative luminance 0.2448

Colors that go with #728b9d

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 →

#9d8472

#729d99 · #72759d

#9d728b · #8b9d72

Split-complementary

Open in tool →

#9d7275 · #9d9972

#99729d · #9d8472 · #759d72

Contrast

#728b9d as textRatioAAAA largeAAAFix
Aaon white
3.56:1failpassfail
  • AA: use #60798a as the text (4.57:1)
  • AAA: use #475966 as the text (7.27:1)
  • AA: or shift the background to #212121 (4.52:1)
Aaon black
5.9:1passpassfail
  • AAA: use #849aa9 as the text (7.18:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #728b9d as the background.

Brands using this color

Palettes built around it

mcpConnect your agent — build around #728b9d
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 #728b9d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/728b9d-9cafc4-df4e58-1f212d-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