Color

#521278

#521278
hex#521278
rgbrgb(82, 18, 120)
hslhsl(278, 74%, 27%)
oklchoklch(0.351 0.159 308.3)
Closest name: indigo (#4b0082)Relative luminance 0.0358

Colors that go with #521278

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 →

#377812

#1f1278 · #78126a

#785212 · #127852

Split-complementary

Open in tool →

#6a7812 · #12781f

#781f12 · #377812 · #126a78

Contrast

#521278 as textRatioAAAA largeAAAFix
Aaon white
12.23:1passpasspassPasses AAA — no fix needed.
Aaon black
1.72:1failfailfail
  • AA: use #a945e3 as the text (4.65:1)
  • AAA: use #c27aeb as the text (7.28:1)
  • AA: or shift the background to #9e9e9e (4.57:1)
  • AAA: or shift the background to #c4c4c4 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #521278 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

#521278 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #521278
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 #521278 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/521278-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