Color

#521575

#521575
hex#521575
rgbrgb(82, 21, 117)
hslhsl(278, 70%, 27%)
oklchoklch(0.351 0.154 309.2)
Closest name: indigo (#4b0082)Relative luminance 0.0361

Colors that go with #521575

Crimson, Tomato and Olive Drab 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 →

#387515

#221575 · #751568

#755215 · #157552

Split-complementary

Open in tool →

#687515 · #157522

#752215 · #387515 · #156875

Contrast

#521575 as textRatioAAAA largeAAAFix
Aaon white
12.19:1passpasspassPasses AAA — no fix needed.
Aaon black
1.72:1failfailfail
  • AA: use #a645de as the text (4.53:1)
  • AAA: use #bf79e7 as the text (7.1:1)
  • AA: or shift the background to #9e9e9e (4.55:1)
  • AAA: or shift the background to #c7c7c7 (7.21:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #521575 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

#521575 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #521575
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 #521575 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/521575-ba9cc4-bbcb62-2d1f2c-ebe9f1?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