Color

#ac491b

#ac491b
hex#ac491b
rgbrgb(172, 73, 27)
hslhsl(19, 73%, 39%)
oklchoklch(0.529 0.142 42.4)
Closest name: Rust (#b7410e)Relative luminance 0.1361

Colors that go with #ac491b

Crimson, Denim 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 →

#1b7eac

#ac1b35 · #ac911b

#1bac49 · #491bac

Split-complementary

Open in tool →

#1bac91 · #1b35ac

#35ac1b · #1b7eac · #911bac

Contrast

#ac491b as textRatioAAAA largeAAAFix
Aaon white
5.64:1passpassfail
  • AAA: use #923e17 as the text (7.18:1)
Aaon black
3.72:1failpassfail
  • AA: use #c2521e as the text (4.52:1)
  • AAA: use #e37a4a as the text (7.15:1)
  • AA: or shift the background to #e6e6e6 (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ac491b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#ac491b reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ac491b
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 #ac491b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ac491b-c4ad9c-62cbb9-2d2a1f-f1e9eb?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