Color

#673091

#673091
hex#673091
rgbrgb(103, 48, 145)
hslhsl(274, 50%, 38%)
oklchoklch(0.432 0.156 307.1)
Closest name: rebeccapurple (#663399)Relative luminance 0.0704

Colors that go with #673091

Olive Green, Charcoal and Teal lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5a9130

#373091 · #91308b

#916730 · #309167

Split-complementary

Open in tool →

#8b9130 · #309137

#913730 · #5a9130 · #308b91

Contrast

#673091 as textRatioAAAA largeAAAFix
Aaon white
8.72:1passpasspassPasses AAA — no fix needed.
Aaon black
2.41:1failfailfail
  • AA: use #995bc8 as the text (4.68:1)
  • AAA: use #b385d6 as the text (7.24:1)
  • AA: or shift the background to #bdbdbd (4.64:1)
  • AAA: or shift the background to #e8e8e8 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #673091 as the background.

Brands using this color

Fonts for this mood

#673091 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #673091
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #673091 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/673091-b79cc4-c2cb62-2d1f2d-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