Color

#3b61ba

#3b61ba
hex#3b61ba
rgbrgb(59, 97, 186)
hslhsl(222, 52%, 48%)
oklchoklch(0.513 0.147 264.4)
Closest name: Denim (#1560bd)Relative luminance 0.1302

Colors that go with #3b61ba

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 →

#ba943b

#3ba1ba · #543bba

#ba3b61 · #61ba3b

Split-complementary

Open in tool →

#ba543b · #a1ba3b

#ba3ba1 · #ba943b · #3bba54

Contrast

#3b61ba as textRatioAAAA largeAAAFix
Aaon white
5.83:1passpassfail
  • AAA: use #3355a3 as the text (7.07:1)
Aaon black
3.6:1failpassfail
  • AA: use #4d71c7 as the text (4.5:1)
  • AAA: use #7b96d5 as the text (7.17:1)
  • AA: or shift the background to #e3e3e3 (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3b61ba as the background.

Brands using this color

Fonts for this mood

#3b61ba reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3b61ba
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 #3b61ba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3b61ba-9ca3c4-df6e4e-211f2d-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