Color

#3d4cd1

#3d4cd1
hex#3d4cd1
rgbrgb(61, 76, 209)
hslhsl(234, 62%, 53%)
oklchoklch(0.491 0.203 271.6)
Closest name: Blurple (#5539cc)Relative luminance 0.1076

Colors that go with #3d4cd1

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.

Real palettes that use #3d4cd1

Tints & shades

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

Harmonies

Complementary

Open in tool →

#d1c33d

#3d96d1 · #783dd1

#d13d4c · #4cd13d

Split-complementary

Open in tool →

#d1783d · #96d13d

#d13d96 · #d1c33d · #3dd178

Contrast

#3d4cd1 as textRatioAAAA largeAAAFix
Aaon white
6.66:1passpassfail
  • AAA: use #3544d0 as the text (7.27:1)
Aaon black
3.15:1failpassfail
  • AA: use #5e6ad9 as the text (4.54:1)
  • AAA: use #8790e3 as the text (7.13:1)
  • AA: or shift the background to #d6d6d6 (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3d4cd1 as the background.

Brands using this color

Fonts for this mood

#3d4cd1 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3d4cd1
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 #3d4cd1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3d4cd1-9d9cc4-df8a4e-241f2d-e9eef1?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