Color

#3942ef

#3942ef
hex#3942ef
rgbrgb(57, 66, 239)
hslhsl(237, 85%, 58%)
oklchoklch(0.502 0.251 270.8)
Closest name: Meteor Shower (#5533ff)Relative luminance 0.11

Tints & shades

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

Harmonies

Complementary

Open in tool →

#efe639

#399def · #8b39ef

#ef3942 · #42ef39

Split-complementary

Open in tool →

#ef8b39 · #9def39

#ef399d · #efe639 · #39ef8b

Contrast

#3942ef as textRatioAAAA largeAAAFix
Aaon white
6.56:1passpassfail
  • AAA: use #2f39ee as the text (7.14:1)
Aaon black
3.2:1failpassfail
  • AA: use #5f66f2 as the text (4.67:1)
  • AAA: use #898ef5 as the text (7.25:1)
  • AA: or shift the background to #d6d6d6 (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3942ef 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

#3942ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3942ef
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 #3942ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3942ef-9f9cc4-df924e-251f2d-e9edf1?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