Color

#5d63cb

#5d63cb
hex#5d63cb
rgbrgb(93, 99, 203)
hslhsl(237, 51%, 58%)
oklchoklch(0.549 0.158 277.3)
Closest name: slateblue (#6a5acd)Relative luminance 0.1556

Colors that go with #5d63cb

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 →

#cbc55d

#5d99cb · #8e5dcb

#cb5d63 · #63cb5d

Split-complementary

Open in tool →

#cb8e5d · #99cb5d

#cb5d99 · #cbc55d · #5dcb8e

Contrast

#5d63cb as textRatioAAAA largeAAAFix
Aaon white
5.11:1passpassfail
  • AAA: use #4249c2 as the text (7.09:1)
Aaon black
4.11:1failpassfail
  • AA: use #696ece as the text (4.72:1)
  • AAA: use #8b8fda as the text (7.04:1)
  • AA: or shift the background to #f2f2f2 (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5d63cb as the background.

Brands using this color

Fonts for this mood

#5d63cb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5d63cb
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 #5d63cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5d63cb-9f9cc4-df924e-251f2d-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