Color

#3154bf

#3154bf
hex#3154bf
rgbrgb(49, 84, 191)
hslhsl(225, 59%, 47%)
oklchoklch(0.485 0.173 266.2)
Closest name: Denim (#1560bd)Relative luminance 0.1076

Colors that go with #3154bf

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 →

#bf9b31

#319bbf · #5431bf

#bf3154 · #54bf31

Split-complementary

Open in tool →

#bf5431 · #9bbf31

#bf319b · #bf9b31 · #31bf54

Contrast

#3154bf as textRatioAAAA largeAAAFix
Aaon white
6.66:1passpassfail
  • AAA: use #2f51b6 as the text (7.06:1)
Aaon black
3.15:1failpassfail
  • AA: use #5171d2 as the text (4.64:1)
  • AAA: use #7d95de as the text (7.23:1)
  • AA: or shift the background to #d6d6d6 (4.59:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3154bf as the background.

Brands using this color

Fonts for this mood

#3154bf reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3154bf
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 #3154bf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3154bf-9ca1c4-df754e-221f2d-e9eff1?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