Color

#3142bf

#3142bf
hex#3142bf
rgbrgb(49, 66, 191)
hslhsl(233, 59%, 47%)
oklchoklch(0.451 0.194 270.3)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0831

Colors that go with #3142bf

Charcoal, Sea Green and Steel Blue 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 →

#bfae31

#3188bf · #6731bf

#bf3142 · #42bf31

Split-complementary

Open in tool →

#bf6731 · #88bf31

#bf3188 · #bfae31 · #31bf67

Contrast

#3142bf as textRatioAAAA largeAAAFix
Aaon white
7.89:1passpasspassPasses AAA — no fix needed.
Aaon black
2.66:1failfailfail
  • AA: use #5d6bd5 as the text (4.53:1)
  • AAA: use #8590e0 as the text (7.06:1)
  • AA: or shift the background to #c4c4c4 (4.52:1)
  • AAA: or shift the background to #f2f2f2 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3142bf 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

#3142bf reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3142bf
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 #3142bf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3142bf-9c9cc4-df884e-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