Color

#616c51

#616c51
hex#616c51
rgbrgb(97, 108, 81)
hslhsl(84, 14%, 37%)
oklchoklch(0.514 0.043 125.9)
Closest name: Cactus (#5b6f55)Relative luminance 0.1386

Colors that go with #616c51

Charcoal, Slate Blue 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.

Real palettes that use #616c51

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5c516c

#6c6951 · #546c51

#51616c · #6c5161

Split-complementary

Open in tool →

#51546c · #69516c

#516c69 · #5c516c · #6c5154

Contrast

#616c51 as textRatioAAAA largeAAAFix
Aaon white
5.57:1passpassfail
  • AAA: use #515a44 as the text (7.25:1)
Aaon black
3.77:1failpassfail
  • AA: use #6e7a5c as the text (4.6:1)
  • AAA: use #8d9a79 as the text (7.03:1)
  • AA: or shift the background to #e8e8e8 (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #616c51 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 #616c51
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 #616c51 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/616c51-afbea2-4e5adf-222d1f-f1f0e9?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