Color

#b42d2f

#b42d2f
hex#b42d2f
rgbrgb(180, 45, 47)
hslhsl(359, 60%, 44%)
oklchoklch(0.511 0.172 25)
Closest name: firebrick (#b22222)Relative luminance 0.1179

Colors that go with #b42d2f

Royal Blue, Steel Blue and Teal 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 #b42d2f

Tints & shades

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

Harmonies

Complementary

Open in tool →

#2db4b1

#b42d72 · #b46e2d

#2fb42d · #2d2fb4

Split-complementary

Open in tool →

#2db46e · #2d72b4

#72b42d · #2db4b1 · #6e2db4

Contrast

#b42d2f as textRatioAAAA largeAAAFix
Aaon white
6.26:1passpassfail
  • AAA: use #a3292b as the text (7.22:1)
Aaon black
3.36:1failpassfail
  • AA: use #d04346 as the text (4.57:1)
  • AAA: use #dd787a as the text (7.04:1)
  • AA: or shift the background to #dbdbdb (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 #b42d2f as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#b42d2f reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b42d2f
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 #b42d2f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b42d2f-c4a09c-62cb96-2d251f-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