Color

#3148af

#3148af
hex#3148af
rgbrgb(49, 72, 175)
hslhsl(229, 56%, 44%)
oklchoklch(0.448 0.166 269)
Closest name: Cobalt Blue (#0047ab)Relative luminance 0.0838

Colors that go with #3148af

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 →

#af9831

#3187af · #5931af

#af3148 · #48af31

Split-complementary

Open in tool →

#af5931 · #87af31

#af3187 · #af9831 · #31af59

Contrast

#3148af as textRatioAAAA largeAAAFix
Aaon white
7.85:1passpasspassPasses AAA — no fix needed.
Aaon black
2.68:1failfailfail
  • AA: use #586ed0 as the text (4.56:1)
  • AAA: use #8494dc as the text (7.25:1)
  • AA: or shift the background to #c7c7c7 (4.64:1)
  • AAA: or shift the background to #f2f2f2 (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 #3148af as the background.

Brands using this color

Fonts for this mood

#3148af reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3148af
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 #3148af and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3148af-9c9fc4-df7e4e-231f2d-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