Color

#3f03e2

#3f03e2
hex#3f03e2
rgbrgb(63, 3, 226)
hslhsl(256, 97%, 45%)
oklchoklch(0.439 0.272 276.1)
Closest name: Busty Blue (#3300cc)Relative luminance 0.0661

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a7e203

#0337e2 · #ae03e2

#e23f03 · #03e23f

Split-complementary

Open in tool →

#e2ae03 · #37e203

#e20337 · #a7e203 · #03e2ae

Contrast

#3f03e2 as textRatioAAAA largeAAAFix
Aaon white
9.04:1passpasspassPasses AAA — no fix needed.
Aaon black
2.32:1failfailfail
  • AA: use #8154fc as the text (4.61:1)
  • AAA: use #a281fd as the text (7.09:1)
  • AA: or shift the background to #b8b8b8 (4.56:1)
  • AAA: or shift the background to #e3e3e3 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3f03e2 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

#3f03e2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3f03e2
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 #3f03e2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3f03e2-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