Color

#a91fff

#a91fff
hex#a91fff
rgbrgb(169, 31, 255)
hslhsl(277, 100%, 56%)
oklchoklch(0.589 0.289 306.1)
Closest name: Cosmic Heart (#9601f4)Relative luminance 0.1663

Tints & shades

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

Harmonies

Complementary

Open in tool →

#75ff1f

#391fff · #ff1fe5

#ffa91f · #1fffa9

Split-complementary

Open in tool →

#e5ff1f · #1fff39

#ff391f · #75ff1f · #1fe5ff

Contrast

#a91fff as textRatioAAAA largeAAAFix
Aaon white
4.85:1passpassfail
  • AAA: use #8400d6 as the text (7.11:1)
Aaon black
4.33:1failpassfail
  • AA: use #ad29ff as the text (4.54:1)
  • AAA: use #c870ff as the text (7.22:1)
  • AA: or shift the background to #f7f7f7 (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #a91fff 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

#a91fff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #a91fff
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 #a91fff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a91fff-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