Color

#1b3041

#1b3041
hex#1b3041
rgbrgb(27, 48, 65)
hslhsl(207, 41%, 18%)
oklchoklch(0.3 0.041 244.2)
Closest name: Blue Whale (#1e3442)Relative luminance 0.0273

Tints & shades

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

Harmonies

Complementary

Open in tool →

#412c1b

#1b413f · #1b1d41

#411b30 · #30411b

Split-complementary

Open in tool →

#411b1d · #413f1b

#3f1b41 · #412c1b · #1d411b

Contrast

#1b3041 as textRatioAAAA largeAAAFix
Aaon white
13.59:1passpasspassPasses AAA — no fix needed.
Aaon black
1.55:1failfailfail
  • AA: use #457aa5 as the text (4.58:1)
  • AAA: use #6c9bc1 as the text (7.1:1)
  • AA: or shift the background to #969696 (4.59:1)
  • AAA: or shift the background to #bababa (7:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b3041 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1b3041 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b3041
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #1b3041 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b3041-9cadc4-df4e53-1f212d-e9f1f1?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