Color

#3904be

#3904be
hex#3904be
rgbrgb(57, 4, 190)
hslhsl(257, 96%, 38%)
oklchoklch(0.39 0.237 278.2)
Closest name: Galactic Highway (#3311bb)Relative luminance 0.0467

Tints & shades

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

Harmonies

Complementary

Open in tool →

#89be04

#042cbe · #9604be

#be3904 · #04be39

Split-complementary

Open in tool →

#be9604 · #2cbe04

#be042c · #89be04 · #04be96

Contrast

#3904be as textRatioAAAA largeAAAFix
Aaon white
10.85:1passpasspassPasses AAA — no fix needed.
Aaon black
1.93:1failfailfail
  • AA: use #8455fc as the text (4.69:1)
  • AAA: use #a582fc as the text (7.2:1)
  • AA: or shift the background to #a8a8a8 (4.56:1)
  • AAA: or shift the background to #d1d1d1 (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3904be 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

#3904be reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3904be
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 #3904be and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3904be-ac9cc4-dfc24e-291f2d-e9ebf1?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