Color

#728397

#728397
hex#728397
rgbrgb(114, 131, 151)
hslhsl(212, 15%, 52%)
oklchoklch(0.603 0.036 252.6)
Closest name: Slate Gray (#708090)Relative luminance 0.2204

Colors that go with #728397

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 →

#978672

#729697 · #737297

#977283 · #839772

Split-complementary

Open in tool →

#977372 · #969772

#977296 · #978672 · #729773

Contrast

#728397 as textRatioAAAA largeAAAFix
Aaon white
3.88:1failpassfail
  • AA: use #66778a as the text (4.59:1)
  • AAA: use #4c5867 as the text (7.24:1)
  • AA: or shift the background to #171717 (4.62:1)
Aaon black
5.41:1passpassfail
  • AAA: use #8a98a8 as the text (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #728397 as the background.

Brands using this color

mcpConnect your agent — build around #728397
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 #728397 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/728397-9caac4-df564e-1f202d-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