Color

#6301cb

#6301cb
hex#6301cb
rgbrgb(99, 1, 203)
hslhsl(269, 99%, 40%)
oklchoklch(0.445 0.246 293.3)
Closest name: Blurple (#5539cc)Relative luminance 0.0699

Tints & shades

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

Harmonies

Complementary

Open in tool →

#69cb01

#0104cb · #c801cb

#cb6301 · #01cb63

Split-complementary

Open in tool →

#cbc801 · #04cb01

#cb0104 · #69cb01 · #01cbc8

Contrast

#6301cb as textRatioAAAA largeAAAFix
Aaon white
8.76:1passpasspassPasses AAA — no fix needed.
Aaon black
2.4:1failfailfail
  • AA: use #9b3efe as the text (4.51:1)
  • AAA: use #b876fe as the text (7.06:1)
  • AA: or shift the background to #bababa (4.51:1)
  • AAA: or shift the background to #e6e6e6 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #6301cb as the background.

Brands using this color

Fonts for this mood

#6301cb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #6301cb
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 #6301cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6301cb-b49cc4-cbcb62-2c1f2d-e9e9f1?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