Color

#5d51cd

#5d51cd
hex#5d51cd
rgbrgb(93, 81, 205)
hslhsl(246, 55%, 56%)
oklchoklch(0.518 0.185 282.2)
Closest name: slateblue (#6a5acd)Relative luminance 0.1262

Colors that go with #5d51cd

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 →

#c0cd51

#5182cd · #9b51cd

#cd5d51 · #51cd5d

Split-complementary

Open in tool →

#cd9b51 · #82cd51

#cd5182 · #c0cd51 · #51cd9b

Contrast

#5d51cd as textRatioAAAA largeAAAFix
Aaon white
5.96:1passpassfail
  • AAA: use #4f41c8 as the text (7.19:1)
Aaon black
3.52:1failpassfail
  • AA: use #7369d3 as the text (4.69:1)
  • AAA: use #958cde as the text (7.08:1)
  • AA: or shift the background to #e0e0e0 (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 #5d51cd 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

#5d51cd reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5d51cd
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 #5d51cd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5d51cd-a59cc4-dfa74e-271f2d-e9ecf1?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