Color

#331d35

#331d35
hex#331d35
rgbrgb(51, 29, 53)
hslhsl(295, 29%, 16%)
oklchoklch(0.27 0.053 323.9)
Closest name: Nightly Voyager (#391531)Relative luminance 0.0184

Colors that go with #331d35

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 →

#1f351d

#271d35 · #351d2b

#35331d · #1d3533

Split-complementary

Open in tool →

#2b351d · #1d3527

#35271d · #1f351d · #1d2b35

Contrast

#331d35 as textRatioAAAA largeAAAFix
Aaon white
15.35:1passpasspassPasses AAA — no fix needed.
Aaon black
1.37:1failfailfail
  • AA: use #a05ea6 as the text (4.65:1)
  • AAA: use #b785bc as the text (7.09:1)
  • AA: or shift the background to #8c8c8c (4.57:1)
  • AAA: or shift the background to #b0b0b0 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #331d35 as the background.

Brands using this color

Fonts for this mood

#331d35 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #331d35
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 #331d35 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/331d35-c19fbf-9dcb62-2d1f28-ede9f1?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