Color

#673d8f

#673d8f
hex#673d8f
rgbrgb(103, 61, 143)
hslhsl(271, 40%, 40%)
oklchoklch(0.449 0.133 305.3)
Closest name: Lords of the Night (#664488)Relative luminance 0.082

Tints & shades

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

Harmonies

Complementary

Open in tool →

#658f3d

#3f3d8f · #8f3d8d

#8f673d · #3d8f67

Split-complementary

Open in tool →

#8d8f3d · #3d8f3f

#8f3f3d · #658f3d · #3d8d8f

Contrast

#673d8f as textRatioAAAA largeAAAFix
Aaon white
7.95:1passpasspassPasses AAA — no fix needed.
Aaon black
2.64:1failfailfail
  • AA: use #9062bc as the text (4.66:1)
  • AAA: use #ac89cd as the text (7.21:1)
  • AA: or shift the background to #c4c4c4 (4.56:1)
  • AAA: or shift the background to #f2f2f2 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #673d8f 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

#673d8f reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #673d8f
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 #673d8f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/673d8f-b59cc4-c7cb62-2c1f2d-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