Color

#1f49bd

#1f49bd
hex#1f49bd
rgbrgb(31, 73, 189)
hslhsl(224, 72%, 43%)
oklchoklch(0.455 0.188 264.6)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0873

Colors that go with #1f49bd

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 →

#bd921f

#1f98bd · #441fbd

#bd1f49 · #49bd1f

Split-complementary

Open in tool →

#bd441f · #98bd1f

#bd1f98 · #bd921f · #1fbd44

Contrast

#1f49bd as textRatioAAAA largeAAAFix
Aaon white
7.65:1passpasspassPasses AAA — no fix needed.
Aaon black
2.75:1failfailfail
  • AA: use #4770e1 as the text (4.67:1)
  • AAA: use #7392e8 as the text (7.01:1)
  • AA: or shift the background to #c7c7c7 (4.52:1)
  • AAA: or shift the background to #f5f5f5 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1f49bd as the background.

Brands using this color

Fonts for this mood

#1f49bd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1f49bd
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 #1f49bd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1f49bd-9ca2c4-df724e-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