Color

#731e8a

#731e8a
hex#731e8a
rgbrgb(115, 30, 138)
hslhsl(287, 64%, 33%)
oklchoklch(0.423 0.175 317.9)
Closest name: Ultraberry (#770088)Relative luminance 0.0641

Colors that go with #731e8a

Forest Green, Charcoal and Crimson 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 →

#368a1e

#3d1e8a · #8a1e6b

#8a731e · #1e8a73

Split-complementary

Open in tool →

#6b8a1e · #1e8a3d

#8a3d1e · #368a1e · #1e6b8a

Contrast

#731e8a as textRatioAAAA largeAAAFix
Aaon white
9.2:1passpasspassPasses AAA — no fix needed.
Aaon black
2.28:1failfailfail
  • AA: use #b43fd5 as the text (4.61:1)
  • AAA: use #c975e1 as the text (7.12:1)
  • AA: or shift the background to #b8b8b8 (4.64:1)
  • AAA: or shift the background to #e3e3e3 (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #731e8a 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

#731e8a reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #731e8a
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 #731e8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/731e8a-bd9fc1-abcb62-2d1f2a-ece9f1?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