Color

#519a8a

#519a8a
hex#519a8a
rgbrgb(81, 154, 138)
hslhsl(167, 31%, 46%)
oklchoklch(0.634 0.078 177.7)
Closest name: Highlands (#449084)Relative luminance 0.267

Colors that go with #519a8a

Charcoal, Copper and Blush Pink 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 #519a8a

Tints & shades

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

Harmonies

Complementary

Open in tool →

#9a5161

#519a66 · #51859a

#8a519a · #9a8a51

Split-complementary

Open in tool →

#9a5185 · #9a6651

#66519a · #9a5161 · #859a51

Contrast

#519a8a as textRatioAAAA largeAAAFix
Aaon white
3.31:1failpassfail
  • AA: use #437f72 as the text (4.65:1)
  • AAA: use #336157 as the text (7.03:1)
  • AA: or shift the background to #262626 (4.57:1)
Aaon black
6.34:1passpassfail
  • AAA: use #56a493 as the text (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #519a8a 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 #519a8a
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 #519a8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/519a8a-a2bebb-d459af-1f2a2d-e9f1ec?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