Color

#11555f

#11555f
hex#11555f
rgbrgb(17, 85, 95)
hslhsl(188, 70%, 22%)
oklchoklch(0.414 0.066 209.8)
Closest name: Abyssal Waters (#005765)Relative luminance 0.0744

Colors that go with #11555f

Crimson, Steel Blue 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 →

#5f1b11

#115f43 · #112e5f

#5f1155 · #555f11

Split-complementary

Open in tool →

#5f112e · #5f4311

#43115f · #5f1b11 · #2e5f11

Contrast

#11555f as textRatioAAAA largeAAAFix
Aaon white
8.44:1passpasspassPasses AAA — no fix needed.
Aaon black
2.49:1failfailfail
  • AA: use #1a8393 as the text (4.71:1)
  • AAA: use #21a6ba as the text (7.23:1)
  • AA: or shift the background to #bfbfbf (4.59:1)
  • AAA: or shift the background to #ebebeb (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #11555f as the background.

Brands using this color

Fonts for this mood

#11555f reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #11555f
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 #11555f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/11555f-a2b7be-df4e81-1f252d-e9f1ee?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