Color

#330057

#330057
hex#330057
rgbrgb(51, 0, 87)
hslhsl(275, 100%, 17%)
oklchoklch(0.259 0.135 303.8)
Closest name: Hollow Knight (#330055)Relative luminance 0.0139

Tints & shades

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

Harmonies

Complementary

Open in tool →

#245700

#070057 · #57004f

#573300 · #005733

Split-complementary

Open in tool →

#4f5700 · #005707

#570700 · #245700 · #004f57

Contrast

#330057 as textRatioAAAA largeAAAFix
Aaon white
16.43:1passpasspassPasses AAA — no fix needed.
Aaon black
1.28:1failfailfail
  • AA: use #aa33ff as the text (4.63:1)
  • AAA: use #c370ff as the text (7.08:1)
  • AA: or shift the background to #878787 (4.57:1)
  • AAA: or shift the background to #ababab (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #330057 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

#330057 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #330057
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 #330057 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/330057-b89cc4-c0cb62-2d1f2d-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