Color

#505377

#505377
hex#505377
rgbrgb(80, 83, 119)
hslhsl(235, 20%, 39%)
oklchoklch(0.455 0.059 280.1)
Closest name: Deep Indigo (#4c567a)Relative luminance 0.0922

Colors that go with #505377

Steel Blue, Blue and Crimson 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 #505377

Tints & shades

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

Harmonies

Complementary

Open in tool →

#777450

#506777 · #605077

#775053 · #537750

Split-complementary

Open in tool →

#776050 · #677750

#775067 · #777450 · #507760

Contrast

#505377 as textRatioAAAA largeAAAFix
Aaon white
7.38:1passpasspassPasses AAA — no fix needed.
Aaon black
2.84:1failfailfail
  • AA: use #6f739f as the text (4.63:1)
  • AAA: use #9194b6 as the text (7.12:1)
  • AA: or shift the background to #cccccc (4.6:1)
  • AAA: or shift the background to #fafafa (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #505377 as the background.

Brands using this color

mcpConnect your agent — build around #505377
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 #505377 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/505377-9e9cc4-df8d4e-241f2d-e9eef1?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