Color

#519090

#519090
hex#519090
rgbrgb(81, 144, 144)
hslhsl(180, 28%, 44%)
oklchoklch(0.611 0.065 195.6)
Closest name: Highlands (#449084)Relative luminance 0.2371

Colors that go with #519090

Charcoal, Copper and Cobalt 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.

Real palettes that use #519090

Tints & shades

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

Harmonies

Complementary

Open in tool →

#905151

#519070 · #517090

#905190 · #909051

Split-complementary

Open in tool →

#905170 · #907051

#705190 · #905151 · #709051

Contrast

#519090 as textRatioAAAA largeAAAFix
Aaon white
3.66:1failpassfail
  • AA: use #487f7f as the text (4.55:1)
  • AAA: use #355f5f as the text (7.11:1)
  • AA: or shift the background to #1f1f1f (4.51:1)
Aaon black
5.74:1passpassfail
  • AAA: use #5ca3a3 as the text (7.22:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #519090 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 #519090
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 #519090 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/519090-a2bbbe-d45994-1f272d-e9f1ed?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