Color

#5b56c8

#5b56c8
hex#5b56c8
rgbrgb(91, 86, 200)
hslhsl(243, 51%, 56%)
oklchoklch(0.521 0.172 280.6)
Closest name: slateblue (#6a5acd)Relative luminance 0.1305

Colors that go with #5b56c8

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 →

#c2c856

#5689c8 · #9556c8

#c85b56 · #56c85b

Split-complementary

Open in tool →

#c89556 · #89c856

#c85689 · #c2c856 · #56c895

Contrast

#5b56c8 as textRatioAAAA largeAAAFix
Aaon white
5.82:1passpassfail
  • AAA: use #4c46c3 as the text (7.07:1)
Aaon black
3.61:1failpassfail
  • AA: use #6e69ce as the text (4.57:1)
  • AAA: use #938fdb as the text (7.19:1)
  • AA: or shift the background to #e3e3e3 (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5b56c8 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

#5b56c8 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5b56c8
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 #5b56c8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5b56c8-a39cc4-dfa04e-261f2d-e9edf1?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