Color

#9b15ef

#9b15ef
hex#9b15ef
rgbrgb(155, 21, 239)
hslhsl(277, 87%, 51%)
oklchoklch(0.553 0.278 305.4)
Closest name: Cosmic Heart (#9601f4)Relative luminance 0.1374

Colors that go with #9b15ef

Olive Green, Charcoal and Denim 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 →

#69ef15

#2f15ef · #ef15d5

#ef9b15 · #15ef9b

Split-complementary

Open in tool →

#d5ef15 · #15ef2f

#ef2f15 · #69ef15 · #15d5ef

Contrast

#9b15ef as textRatioAAAA largeAAAFix
Aaon white
5.6:1passpassfail
  • AAA: use #840ecd as the text (7.18:1)
Aaon black
3.75:1failpassfail
  • AA: use #aa37f1 as the text (4.53:1)
  • AAA: use #c475f5 as the text (7.21:1)
  • 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 #9b15ef as the background.

Brands using this color

Fonts for this mood

#9b15ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #9b15ef
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 #9b15ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/9b15ef-b99cc4-bdcb62-2d1f2c-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