Color

#3190dd

#3190dd
hex#3190dd
rgbrgb(49, 144, 221)
hslhsl(207, 72%, 53%)
oklchoklch(0.635 0.145 247.4)
Closest name: Blue Jay (#5588dd)Relative luminance 0.2582

Colors that go with #3190dd

Charcoal, Copper 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 →

#dd7f31

#31ddd5 · #3139dd

#dd3190 · #90dd31

Split-complementary

Open in tool →

#dd3139 · #ddd531

#d531dd · #dd7f31 · #39dd31

Contrast

#3190dd as textRatioAAAA largeAAAFix
Aaon white
3.41:1failpassfail
  • AA: use #1f78c1 as the text (4.65:1)
  • AAA: use #185a91 as the text (7.22:1)
  • AA: or shift the background to #242424 (4.56:1)
Aaon black
6.16:1passpassfail
  • AAA: use #479ce1 as the text (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3190dd as the background.

Brands using this color

Fonts for this mood

#3190dd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3190dd
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 #3190dd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3190dd-9cadc4-df4e53-1f212d-e9f1f1?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