Color

#281b4b

#281b4b
hex#281b4b
rgbrgb(40, 27, 75)
hslhsl(256, 47%, 20%)
oklchoklch(0.268 0.085 292.1)
Closest name: Azulado (#211d49)Relative luminance 0.0174

Colors that go with #281b4b

Charcoal, Dark Olive Green and Royal 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 →

#3e4b1b

#1b264b · #401b4b

#4b281b · #1b4b28

Split-complementary

Open in tool →

#4b401b · #264b1b

#4b1b26 · #3e4b1b · #1b4b40

Contrast

#281b4b as textRatioAAAA largeAAAFix
Aaon white
15.57:1passpasspassPasses AAA — no fix needed.
Aaon black
1.35:1failfailfail
  • AA: use #8065c8 as the text (4.61:1)
  • AAA: use #9f8bd5 as the text (7.13:1)
  • AA: or shift the background to #8a8a8a (4.51:1)
  • AAA: or shift the background to #b0b0b0 (7.18:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #281b4b as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#281b4b reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #281b4b
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 #281b4b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/281b4b-ab9cc4-dfbf4e-291f2d-e9ebf1?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