Color

#681bc5

#681bc5
hex#681bc5
rgbrgb(104, 27, 197)
hslhsl(267, 76%, 44%)
oklchoklch(0.456 0.231 295.6)
Closest name: Blurple (#5539cc)Relative luminance 0.0776

Tints & shades

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

Harmonies

Complementary

Open in tool →

#79c51b

#1b23c5 · #bd1bc5

#c5681b · #1bc568

Split-complementary

Open in tool →

#c5bd1b · #23c51b

#c51b23 · #79c51b · #1bc5bd

Contrast

#681bc5 as textRatioAAAA largeAAAFix
Aaon white
8.23:1passpasspassPasses AAA — no fix needed.
Aaon black
2.55:1failfailfail
  • AA: use #9450e7 as the text (4.56:1)
  • AAA: use #b281ee as the text (7.27:1)
  • AA: or shift the background to #c2c2c2 (4.62:1)
  • AAA: or shift the background to #ededed (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #681bc5 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

#681bc5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #681bc5
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 #681bc5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/681bc5-b39cc4-dfda4e-2c1f2d-e9eaf1?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