Color

#6557cb

#6557cb
hex#6557cb
rgbrgb(101, 87, 203)
hslhsl(247, 53%, 57%)
oklchoklch(0.533 0.173 284.3)
Closest name: slateblue (#6a5acd)Relative luminance 0.1389

Tints & shades

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

Harmonies

Complementary

Open in tool →

#becb57

#5784cb · #9f57cb

#cb6557 · #57cb65

Split-complementary

Open in tool →

#cb9f57 · #84cb57

#cb5784 · #becb57 · #57cb9f

Contrast

#6557cb as textRatioAAAA largeAAAFix
Aaon white
5.56:1passpassfail
  • AAA: use #4f40c4 as the text (7.34:1)
Aaon black
3.78:1failpassfail
  • AA: use #7367d0 as the text (4.58:1)
  • AAA: use #978edc as the text (7.22:1)
  • AA: or shift the background to #e8e8e8 (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #6557cb 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

#6557cb reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #6557cb
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 #6557cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6557cb-a59cc4-dfaa4e-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