Color

#5128cc

#5128cc
hex#5128cc
rgbrgb(81, 40, 204)
hslhsl(255, 67%, 48%)
oklchoklch(0.451 0.229 283.8)
Closest name: Blurple (#5539cc)Relative luminance 0.0763

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#a3cc28

#2851cc · #a328cc

#cc5128 · #28cc51

Split-complementary

Open in tool →

#cca328 · #51cc28

#cc2851 · #a3cc28 · #28cca3

Contrast

#5128cc as textRatioAAAA largeAAAFix
Aaon white
8.32:1passpasspassPasses AAA — no fix needed.
Aaon black
2.53:1failfailfail
  • AA: use #7e5ddf as the text (4.52:1)
  • AAA: use #a088e7 as the text (7.17:1)
  • AA: or shift the background to #bfbfbf (4.52:1)
  • AAA: or shift the background to #ededed (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #5128cc 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

#5128cc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #5128cc
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #5128cc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/5128cc-ab9cc4-dfbd4e-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