Color

#20515b

#20515b
hex#20515b
rgbrgb(32, 81, 91)
hslhsl(190, 48%, 24%)
oklchoklch(0.406 0.055 213.2)
Closest name: darkslategray (#2f4f4f)Relative luminance 0.0695

Colors that go with #20515b

Steel Blue, Teal and Rust 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 →

#5b2a20

#205b47 · #20335b

#5b2051 · #515b20

Split-complementary

Open in tool →

#5b2033 · #5b4720

#47205b · #5b2a20 · #335b20

Contrast

#20515b as textRatioAAAA largeAAAFix
Aaon white
8.79:1passpasspassPasses AAA — no fix needed.
Aaon black
2.39:1failfailfail
  • AA: use #32808f as the text (4.62:1)
  • AAA: use #40a2b5 as the text (7.05:1)
  • AA: or shift the background to #bababa (4.53:1)
  • AAA: or shift the background to #e6e6e6 (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #20515b as the background.

Brands using this color

Fonts for this mood

#20515b reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #20515b
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 #20515b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/20515b-a2b6be-df4e7c-1f252d-e9f1ef?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