Color

#331d49

#331d49
hex#331d49
rgbrgb(51, 29, 73)
hslhsl(270, 43%, 20%)
oklchoklch(0.283 0.081 304.9)
Closest name: Midnight Velvet (#2a2243)Relative luminance 0.0206

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#33491d

#1d1d49 · #491d49

#49331d · #1d4933

Split-complementary

Open in tool →

#49491d · #1d491d

#491d1d · #33491d · #1d4949

Contrast

#331d49 as textRatioAAAA largeAAAFix
Aaon white
14.86:1passpasspassPasses AAA — no fix needed.
Aaon black
1.41:1failfailfail
  • AA: use #8f5fbf as the text (4.56:1)
  • AAA: use #ab87cf as the text (7.1:1)
  • AA: or shift the background to #8f8f8f (4.6:1)
  • AAA: or shift the background to #b3b3b3 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #331d49 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

#331d49 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #331d49
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #331d49 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/331d49-b59cc4-c9cb62-2c1f2d-eae9f1?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