Color

#291d3f

#291d3f
hex#291d3f
rgbrgb(41, 29, 63)
hslhsl(261, 37%, 18%)
oklchoklch(0.264 0.063 298.3)
Closest name: Midnight Velvet (#2a2243)Relative luminance 0.0171

Colors that go with #291d3f

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 →

#333f1d

#1d223f · #3a1d3f

#3f291d · #1d3f29

Split-complementary

Open in tool →

#3f3a1d · #223f1d

#3f1d22 · #333f1d · #1d3f3a

Contrast

#291d3f as textRatioAAAA largeAAAFix
Aaon white
15.65:1passpasspassPasses AAA — no fix needed.
Aaon black
1.34:1failfailfail
  • AA: use #8265b8 as the text (4.5:1)
  • AAA: use #a28cca as the text (7.14:1)
  • AA: or shift the background to #8a8a8a (4.53:1)
  • AAA: or shift the background to #b0b0b0 (7.22:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #291d3f as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#291d3f reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #291d3f
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 #291d3f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/291d3f-af9cc4-dfcb4e-2a1f2d-e9eaf1?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