Color

#651fa3

#651fa3
hex#651fa3
rgbrgb(101, 31, 163)
hslhsl(272, 68%, 38%)
oklchoklch(0.425 0.194 302.5)
Closest name: rebeccapurple (#663399)Relative luminance 0.0639

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5da31f

#231fa3 · #a31f9e

#a3651f · #1fa365

Split-complementary

Open in tool →

#9ea31f · #1fa323

#a3231f · #5da31f · #1f9ea3

Contrast

#651fa3 as textRatioAAAA largeAAAFix
Aaon white
9.22:1passpasspassPasses AAA — no fix needed.
Aaon black
2.28:1failfailfail
  • AA: use #9b4fde as the text (4.57:1)
  • AAA: use #b67ee7 as the text (7.13:1)
  • AA: or shift the background to #b8b8b8 (4.65:1)
  • AAA: or shift the background to #e3e3e3 (7.18:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #651fa3 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

#651fa3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #651fa3
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 #651fa3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/651fa3-b69cc4-c5cb62-2d1f2d-eae9f1?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