Color

#331c40

#331c40
hex#331c40
rgbrgb(51, 28, 64)
hslhsl(278, 39%, 18%)
oklchoklch(0.275 0.07 312.1)
Closest name: Midnight Velvet (#2a2243)Relative luminance 0.019

Tints & shades

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

Harmonies

Complementary

Open in tool →

#29401c

#211c40 · #401c3b

#40331c · #1c4033

Split-complementary

Open in tool →

#3b401c · #1c4021

#40211c · #29401c · #1c3b40

Contrast

#331c40 as textRatioAAAA largeAAAFix
Aaon white
15.21:1passpasspassPasses AAA — no fix needed.
Aaon black
1.38:1failfailfail
  • AA: use #965cb7 as the text (4.51:1)
  • AAA: use #b186ca as the text (7.13:1)
  • AA: or shift the background to #8c8c8c (4.52:1)
  • AAA: or shift the background to #b0b0b0 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #331c40 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

#331c40 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #331c40
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 #331c40 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/331c40-ba9cc4-bbcb62-2d1f2c-ebe9f1?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