Color

#281f4d

#281f4d
hex#281f4d
rgbrgb(40, 31, 77)
hslhsl(252, 43%, 21%)
oklchoklch(0.277 0.082 289)
Closest name: Azulado (#211d49)Relative luminance 0.0197

Colors that go with #281f4d

Charcoal, Dark Olive Green and Sea Green 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 →

#434d1f

#1f2c4d · #3f1f4d

#4d281f · #1f4d28

Split-complementary

Open in tool →

#4d3f1f · #2c4d1f

#4d1f2c · #434d1f · #1f4d3f

Contrast

#281f4d as textRatioAAAA largeAAAFix
Aaon white
15.07:1passpasspassPasses AAA — no fix needed.
Aaon black
1.39:1failfailfail
  • AA: use #7b69c3 as the text (4.65:1)
  • AAA: use #9c8ed2 as the text (7.21:1)
  • AA: or shift the background to #8f8f8f (4.66:1)
  • AAA: or shift the background to #b3b3b3 (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #281f4d 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

#281f4d reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #281f4d
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 #281f4d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/281f4d-a99cc4-dfb64e-281f2d-e9ecf1?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