Color

#ac372f

#ac372f
hex#ac372f
rgbrgb(172, 55, 47)
hslhsl(4, 57%, 43%)
oklchoklch(0.507 0.154 27.8)
Closest name: firebrick (#b22222)Relative luminance 0.1171

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2fa4ac

#ac2f65 · #ac762f

#2fac37 · #372fac

Split-complementary

Open in tool →

#2fac76 · #2f65ac

#65ac2f · #2fa4ac · #762fac

Contrast

#ac372f as textRatioAAAA largeAAAFix
Aaon white
6.28:1passpassfail
  • AAA: use #9c322b as the text (7.23:1)
Aaon black
3.34:1failpassfail
  • AA: use #ca483f as the text (4.51:1)
  • AAA: use #da7d77 as the text (7.18:1)
  • AA: or shift the background to #dbdbdb (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ac372f as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#ac372f reads as warm. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ac372f
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #ac372f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ac372f-c4a39c-62cb9f-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