Color

#631fbd

#631fbd
hex#631fbd
rgbrgb(99, 31, 189)
hslhsl(266, 72%, 43%)
oklchoklch(0.446 0.22 294.9)
Closest name: Blurple (#5539cc)Relative luminance 0.0731

Tints & shades

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

Harmonies

Complementary

Open in tool →

#78bd1f

#1f29bd · #b21fbd

#bd631f · #1fbd63

Split-complementary

Open in tool →

#bdb21f · #29bd1f

#bd1f29 · #78bd1f · #1fbdb2

Contrast

#631fbd as textRatioAAAA largeAAAFix
Aaon white
8.53:1passpasspassPasses AAA — no fix needed.
Aaon black
2.46:1failfailfail
  • AA: use #9254e3 as the text (4.6:1)
  • AAA: use #ae80ea as the text (7.08:1)
  • AA: or shift the background to #bdbdbd (4.54:1)
  • AAA: or shift the background to #ebebeb (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #631fbd 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

#631fbd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #631fbd
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 #631fbd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/631fbd-b29cc4-dfd74e-2b1f2d-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