Color

#b31bb6

#b31bb6
hex#b31bb6
rgbrgb(179, 27, 182)
hslhsl(299, 74%, 41%)
oklchoklch(0.548 0.238 327.3)
Closest name: Magentleman (#aa22bb)Relative luminance 0.1374

Colors that go with #b31bb6

Forest Green, Teal and Charcoal 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 →

#1eb61b

#661bb6 · #b61b6b

#b6b31b · #1bb6b3

Split-complementary

Open in tool →

#6bb61b · #1bb666

#b6661b · #1eb61b · #1b6bb6

Contrast

#b31bb6 as textRatioAAAA largeAAAFix
Aaon white
5.6:1passpassfail
  • AAA: use #99179b as the text (7.12:1)
Aaon black
3.75:1failpassfail
  • AA: use #c91ecc as the text (4.54:1)
  • AAA: use #e55fe7 as the text (7.12:1)
  • AA: or shift the background to #e8e8e8 (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #b31bb6 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

#b31bb6 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b31bb6
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 #b31bb6 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b31bb6-c19fbd-96cb62-2d1f27-ede9f1?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