Color

#1b2d5a

#1b2d5a
hex#1b2d5a
rgbrgb(27, 45, 90)
hslhsl(223, 54%, 23%)
oklchoklch(0.309 0.084 265.4)
Closest name: Marine (#042e60)Relative luminance 0.0285

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5a481b

#1b4d5a · #291b5a

#5a1b2d · #2d5a1b

Split-complementary

Open in tool →

#5a291b · #4d5a1b

#5a1b4d · #5a481b · #1b5a29

Contrast

#1b2d5a as textRatioAAAA largeAAAFix
Aaon white
13.38:1passpasspassPasses AAA — no fix needed.
Aaon black
1.57:1failfailfail
  • AA: use #4e71ca as the text (4.54:1)
  • AAA: use #7994d7 as the text (7.03:1)
  • AA: or shift the background to #969696 (4.52:1)
  • AAA: or shift the background to #bdbdbd (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b2d5a as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#1b2d5a reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b2d5a
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 #1b2d5a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b2d5a-9ca3c4-df704e-211f2d-e9eff1?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