Color

#400d33

#400d33
hex#400d33
rgbrgb(64, 13, 51)
hslhsl(315, 66%, 15%)
oklchoklch(0.265 0.092 339.8)
Closest name: Nightly Voyager (#391531)Relative luminance 0.0162

Colors that go with #400d33

Charcoal, Crimson 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 →

#0d3f1a

#330d3f · #3f0d1a

#333f0d · #0d333f

Split-complementary

Open in tool →

#1a3f0d · #0d3f33

#3f330d · #0d3f1a · #0d1a3f

Contrast

#400d33 as textRatioAAAA largeAAAFix
Aaon white
15.87:1passpasspassPasses AAA — no fix needed.
Aaon black
1.32:1failfailfail
  • AA: use #cf2aa6 as the text (4.53:1)
  • AAA: use #e16bc3 as the text (7.09:1)
  • AA: or shift the background to #8a8a8a (4.6:1)
  • AAA: or shift the background to #adadad (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #400d33 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

#400d33 reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #400d33
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 #400d33 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/400d33-c19fb4-7bcb62-2d1f24-efe9f1?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