Color

#3905bd

#3905bd
hex#3905bd
rgbrgb(57, 5, 189)
hslhsl(257, 95%, 38%)
oklchoklch(0.389 0.235 278.3)
Closest name: Galactic Highway (#3311bb)Relative luminance 0.0465

Tints & shades

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

Harmonies

Complementary

Open in tool →

#89bd05

#052dbd · #9505bd

#bd3905 · #05bd39

Split-complementary

Open in tool →

#bd9505 · #2dbd05

#bd052d · #89bd05 · #05bd95

Contrast

#3905bd as textRatioAAAA largeAAAFix
Aaon white
10.88:1passpasspassPasses AAA — no fix needed.
Aaon black
1.93:1failfailfail
  • AA: use #8151fb as the text (4.5:1)
  • AAA: use #a583fc as the text (7.25:1)
  • AA: or shift the background to #a8a8a8 (4.57:1)
  • AAA: or shift the background to #d1d1d1 (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 #3905bd 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

#3905bd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3905bd
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 #3905bd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3905bd-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