Color

#516270

#516270
hex#516270
rgbrgb(81, 98, 112)
hslhsl(207, 16%, 38%)
oklchoklch(0.487 0.031 243.2)
Closest name: Concrete Landscape (#5c606e)Relative luminance 0.1165

Colors that go with #516270

Charcoal, Sienna and Blue 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 →

#705f51

#51706f · #515370

#705162 · #627051

Split-complementary

Open in tool →

#705153 · #706f51

#6f5170 · #705f51 · #537051

Contrast

#516270 as textRatioAAAA largeAAAFix
Aaon white
6.3:1passpassfail
  • AAA: use #4b5b68 as the text (7.01:1)
Aaon black
3.33:1failpassfail
  • AA: use #637788 as the text (4.52:1)
  • AAA: use #8698a7 as the text (7.06:1)
  • AA: or shift the background to #dbdbdb (4.55:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #516270 as the background.

Brands using this color

mcpConnect your agent — build around #516270
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 #516270 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/516270-9cadc4-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