Color

#5b727b

#5b727b
hex#5b727b
rgbrgb(91, 114, 123)
hslhsl(197, 15%, 42%)
oklchoklch(0.537 0.031 223.7)
Closest name: Batman (#656e72)Relative luminance 0.1569

Colors that go with #5b727b

Charcoal, Sienna 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.

Real palettes that use #5b727b

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#7b645b

#5b7b74 · #5b627b

#7b5b72 · #727b5b

Split-complementary

Open in tool →

#7b5b62 · #7b745b

#745b7b · #7b645b · #627b5b

Contrast

#5b727b as textRatioAAAA largeAAAFix
Aaon white
5.08:1passpassfail
  • AAA: use #485a61 as the text (7.21:1)
Aaon black
4.14:1failpassfail
  • AA: use #627a84 as the text (4.64:1)
  • AAA: use #849ba4 as the text (7.21:1)
  • AA: or shift the background to #f2f2f2 (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5b727b as the background.

Brands using this color

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

mcpConnect your agent — build around #5b727b
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 #5b727b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5b727b-9cb4c4-df4e6b-1f232d-e9f1ef?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