Color

#3902cf

#3902cf
hex#3902cf
rgbrgb(57, 2, 207)
hslhsl(256, 98%, 41%)
oklchoklch(0.41 0.255 276.1)
Closest name: Busty Blue (#3300cc)Relative luminance 0.0542

Tints & shades

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

Harmonies

Complementary

Open in tool →

#98cf02

#0232cf · #9f02cf

#cf3902 · #02cf39

Split-complementary

Open in tool →

#cf9f02 · #32cf02

#cf0232 · #98cf02 · #02cf9f

Contrast

#3902cf as textRatioAAAA largeAAAFix
Aaon white
10.08:1passpasspassPasses AAA — no fix needed.
Aaon black
2.08:1failfailfail
  • AA: use #8153fd as the text (4.59:1)
  • AAA: use #a281fe as the text (7.11:1)
  • AA: or shift the background to #b0b0b0 (4.65:1)
  • AAA: or shift the background to #d9d9d9 (7.14:1)

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

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

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

tool url/palettes/new/3902cf-ab9cc4-dfbf4e-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