Color

#4131d3

#4131d3
hex#4131d3
rgbrgb(65, 49, 211)
hslhsl(246, 65%, 51%)
oklchoklch(0.455 0.232 276.3)
Closest name: Blurple (#5539cc)Relative luminance 0.0802

Colors that go with #4131d3

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 →

#c3d331

#3172d3 · #9231d3

#d34131 · #31d341

Split-complementary

Open in tool →

#d39231 · #72d331

#d33172 · #c3d331 · #31d392

Contrast

#4131d3 as textRatioAAAA largeAAAFix
Aaon white
8.06:1passpasspassPasses AAA — no fix needed.
Aaon black
2.6:1failfailfail
  • AA: use #7063de as the text (4.53:1)
  • AAA: use #968de7 as the text (7.26:1)
  • AA: or shift the background to #c2c2c2 (4.53:1)
  • AAA: or shift the background to #f0f0f0 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4131d3 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

#4131d3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4131d3
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 #4131d3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4131d3-a59cc4-dfa74e-271f2d-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