Color

#421f4c

#421f4c
hex#421f4c
rgbrgb(66, 31, 76)
hslhsl(287, 42%, 21%)
oklchoklch(0.309 0.088 318.3)
Closest name: Velvet Cosmos (#441144)Relative luminance 0.0266

Colors that go with #421f4c

Charcoal, Dark Olive Green and Sea Green 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 →

#294c1f

#2c1f4c · #4c1f3f

#4c421f · #1f4c42

Split-complementary

Open in tool →

#3f4c1f · #1f4c2c

#4c2c1f · #294c1f · #1f3f4c

Contrast

#421f4c as textRatioAAAA largeAAAFix
Aaon white
13.71:1passpasspassPasses AAA — no fix needed.
Aaon black
1.53:1failfailfail
  • AA: use #a455b9 as the text (4.58:1)
  • AAA: use #bb80cb as the text (7.06:1)
  • AA: or shift the background to #949494 (4.52:1)
  • AAA: or shift the background to #bababa (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 #421f4c 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

#421f4c reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #421f4c
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 #421f4c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/421f4c-bd9fc1-abcb62-2d1f2a-ece9f1?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