Color

#434ccb

#434ccb
hex#434ccb
rgbrgb(67, 76, 203)
hslhsl(236, 57%, 53%)
oklchoklch(0.489 0.194 273.7)
Closest name: Blurple (#5539cc)Relative luminance 0.1067

Colors that go with #434ccb

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 #434ccb

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cbc243

#4390cb · #7e43cb

#cb434c · #4ccb43

Split-complementary

Open in tool →

#cb7e43 · #90cb43

#cb4390 · #cbc243 · #43cb7e

Contrast

#434ccb as textRatioAAAA largeAAAFix
Aaon white
6.7:1passpassfail
  • AAA: use #3f48ca as the text (7.02:1)
Aaon black
3.13:1failpassfail
  • AA: use #636ad4 as the text (4.54:1)
  • AAA: use #8b91df as the text (7.21:1)
  • AA: or shift the background to #d4d4d4 (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 #434ccb as the background.

Brands using this color

Fonts for this mood

#434ccb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #434ccb
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 #434ccb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/434ccb-9e9cc4-df8f4e-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