Color

#550a8a

#550a8a
hex#550a8a
rgbrgb(85, 10, 138)
hslhsl(275, 86%, 29%)
oklchoklch(0.366 0.183 303.9)
Closest name: Indigo Static (#4b0183)Relative luminance 0.0398

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f8a0a

#150a8a · #8a0a7f

#8a550a · #0a8a55

Split-complementary

Open in tool →

#7f8a0a · #0a8a15

#8a150a · #3f8a0a · #0a7f8a

Contrast

#550a8a as textRatioAAAA largeAAAFix
Aaon white
11.69:1passpasspassPasses AAA — no fix needed.
Aaon black
1.8:1failfailfail
  • AA: use #a53df0 as the text (4.53:1)
  • AAA: use #c075f5 as the text (7.1:1)
  • AA: or shift the background to #a1a1a1 (4.52:1)
  • AAA: or shift the background to #c9c9c9 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #550a8a 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

#550a8a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #550a8a
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 #550a8a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/550a8a-b89cc4-c0cb62-2d1f2d-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