Color

#3559bb

#3559bb
hex#3559bb
rgbrgb(53, 89, 187)
hslhsl(224, 56%, 47%)
oklchoklch(0.494 0.16 265.6)
Closest name: Denim (#1560bd)Relative luminance 0.1149

Colors that go with #3559bb

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 →

#bb9735

#359cbb · #5435bb

#bb3559 · #59bb35

Split-complementary

Open in tool →

#bb5435 · #9cbb35

#bb359c · #bb9735 · #35bb54

Contrast

#3559bb as textRatioAAAA largeAAAFix
Aaon white
6.37:1passpassfail
  • AAA: use #3153af as the text (7.03:1)
Aaon black
3.3:1failpassfail
  • AA: use #5071ce as the text (4.59:1)
  • AAA: use #7c95da as the text (7.17:1)
  • AA: or shift the background to #d9d9d9 (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3559bb as the background.

Brands using this color

Fonts for this mood

#3559bb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3559bb
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 #3559bb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3559bb-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