Color

#3902bb

#3902bb
hex#3902bb
rgbrgb(57, 2, 187)
hslhsl(258, 98%, 37%)
oklchoklch(0.386 0.234 278.7)
Closest name: Galactic Highway (#3311bb)Relative luminance 0.045

Tints & shades

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

Harmonies

Complementary

Open in tool →

#83bb02

#0227bb · #9602bb

#bb3902 · #02bb39

Split-complementary

Open in tool →

#bb9602 · #27bb02

#bb0227 · #83bb02 · #02bb96

Contrast

#3902bb as textRatioAAAA largeAAAFix
Aaon white
11.05:1passpasspassPasses AAA — no fix needed.
Aaon black
1.9:1failfailfail
  • AA: use #8653fd as the text (4.67:1)
  • AAA: use #a681fe as the text (7.19:1)
  • AA: or shift the background to #a6a6a6 (4.54:1)
  • AAA: or shift the background to #cfcfcf (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3902bb 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

#3902bb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3902bb
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 #3902bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3902bb-ad9cc4-dfc44e-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