Color

#390551

#390551
hex#390551
rgbrgb(57, 5, 81)
hslhsl(281, 88%, 17%)
oklchoklch(0.267 0.126 311.2)
Closest name: Hollow Knight (#330055)Relative luminance 0.0157

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1d5105

#130551 · #510544

#513905 · #055139

Split-complementary

Open in tool →

#445105 · #055113

#511305 · #1d5105 · #054451

Contrast

#390551 as textRatioAAAA largeAAAFix
Aaon white
15.98:1passpasspassPasses AAA — no fix needed.
Aaon black
1.31:1failfailfail
  • AA: use #b32cf2 as the text (4.56:1)
  • AAA: use #cb6ff6 as the text (7.14:1)
  • AA: or shift the background to #8a8a8a (4.63:1)
  • AAA: or shift the background to #adadad (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #390551 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

#390551 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #390551
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 #390551 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/390551-ba9fc1-b6cb62-2d1f2c-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