Color

#a31e19

#a31e19
hex#a31e19
rgbrgb(163, 30, 25)
hslhsl(2, 73%, 37%)
oklchoklch(0.465 0.169 28.3)
Closest name: Blood Rush (#aa2222)Relative luminance 0.0879

Colors that go with #a31e19

Royal Blue, Teal and Amber 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 →

#199fa3

#a3195a · #a36319

#19a31e · #1e19a3

Split-complementary

Open in tool →

#19a363 · #195aa3

#5aa319 · #199fa3 · #6319a3

Contrast

#a31e19 as textRatioAAAA largeAAAFix
Aaon white
7.62:1passpasspassPasses AAA — no fix needed.
Aaon black
2.76:1failfailfail
  • AA: use #de312b as the text (4.58:1)
  • AAA: use #e8726d as the text (7.06:1)
  • AA: or shift the background to #c7c7c7 (4.51:1)
  • AAA: or shift the background to #f7f7f7 (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #a31e19 as the background.

Brands using this color

Fonts for this mood

#a31e19 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #a31e19
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 #a31e19 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a31e19-c4a29c-62cb9c-2d261f-f1e9ed?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