Color

#551ae0

#551ae0
hex#551ae0
rgbrgb(85, 26, 224)
hslhsl(258, 79%, 49%)
oklchoklch(0.464 0.258 283.3)
Closest name: Blurple (#5539cc)Relative luminance 0.0805

Colors that go with #551ae0

Charcoal, Denim and Cobalt Blue 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 →

#a4e01a

#1a42e0 · #b81ae0

#e0551a · #1ae055

Split-complementary

Open in tool →

#e0b81a · #42e01a

#e01a42 · #a4e01a · #1ae0b8

Contrast

#551ae0 as textRatioAAAA largeAAAFix
Aaon white
8.04:1passpasspassPasses AAA — no fix needed.
Aaon black
2.61:1failfailfail
  • AA: use #865bec as the text (4.72:1)
  • AAA: use #a484f1 as the text (7.15:1)
  • AA: or shift the background to #c2c2c2 (4.52:1)
  • AAA: or shift the background to #f0f0f0 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #551ae0 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

#551ae0 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #551ae0
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 #551ae0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/551ae0-ad9cc4-dfc44e-291f2d-e9ebf1?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