Color

#a31f33

#a31f33
hex#a31f33
rgbrgb(163, 31, 51)
hslhsl(351, 68%, 38%)
oklchoklch(0.469 0.166 19)
Closest name: brown (#a52a2a)Relative luminance 0.0901

Colors that go with #a31f33

Royal Blue, Teal and Champagne 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.

Real palettes that use #a31f33

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1fa38f

#a31f75 · #a34d1f

#33a31f · #1f33a3

Split-complementary

Open in tool →

#1fa34d · #1f75a3

#75a31f · #1fa38f · #4d1fa3

Contrast

#a31f33 as textRatioAAAA largeAAAFix
Aaon white
7.5:1passpasspassPasses AAA — no fix needed.
Aaon black
2.8:1failfailfail
  • AA: use #d9364e as the text (4.59:1)
  • AAA: use #e47283 as the text (7.03:1)
  • AA: or shift the background to #c9c9c9 (4.53:1)
  • AAA: or shift the background to #fafafa (7.18:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #a31f33 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Palettes built around it

Fonts for this mood

#a31f33 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #a31f33
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 #a31f33 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a31f33-c49c9e-62cb89-2d231f-f1e9ee?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