Color

#6451cd

#6451cd
hex#6451cd
rgbrgb(100, 81, 205)
hslhsl(249, 55%, 56%)
oklchoklch(0.523 0.184 285.1)
Closest name: slateblue (#6a5acd)Relative luminance 0.13

Tints & shades

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

Harmonies

Complementary

Open in tool →

#bacd51

#517ccd · #a151cd

#cd6451 · #51cd64

Split-complementary

Open in tool →

#cda151 · #7ccd51

#cd517c · #bacd51 · #51cda1

Contrast

#6451cd as textRatioAAAA largeAAAFix
Aaon white
5.83:1passpassfail
  • AAA: use #5541c8 as the text (7.06:1)
Aaon black
3.6:1failpassfail
  • AA: use #7565d2 as the text (4.55:1)
  • AAA: use #998cde as the text (7.16:1)
  • AA: or shift the background to #e3e3e3 (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 #6451cd 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

#6451cd reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #6451cd
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 #6451cd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/6451cd-a79cc4-dfae4e-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