Color

#3f2fe9

#3f2fe9
hex#3f2fe9
rgbrgb(63, 47, 233)
hslhsl(245, 81%, 55%)
oklchoklch(0.475 0.259 274.1)
Closest name: Blustering Blue (#4411ff)Relative luminance 0.0897

Colors that go with #3f2fe9

Charcoal, Sea Green and Amber lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#dae92f

#2f7de9 · #9c2fe9

#e93f2f · #2fe93f

Split-complementary

Open in tool →

#e99c2f · #7de92f

#e92f7d · #dae92f · #2fe99c

Contrast

#3f2fe9 as textRatioAAAA largeAAAFix
Aaon white
7.51:1passpasspassPasses AAA — no fix needed.
Aaon black
2.79:1failfailfail
  • AA: use #6e62ef as the text (4.66:1)
  • AAA: use #948cf3 as the text (7.3:1)
  • AA: or shift the background to #c9c9c9 (4.54:1)
  • AAA: or shift the background to #f7f7f7 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3f2fe9 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

#3f2fe9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3f2fe9
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #3f2fe9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3f2fe9-a49cc4-dfa54e-261f2d-e9ecf1?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