Color

#b52124

#b52124
hex#b52124
rgbrgb(181, 33, 36)
hslhsl(359, 69%, 42%)
oklchoklch(0.502 0.183 26.1)
Closest name: firebrick (#b22222)Relative luminance 0.1104

Colors that go with #b52124

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 →

#21b5b3

#b5216e · #b56921

#24b521 · #2124b5

Split-complementary

Open in tool →

#21b569 · #216eb5

#6eb521 · #21b5b3 · #6921b5

Contrast

#b52124 as textRatioAAAA largeAAAFix
Aaon white
6.55:1passpassfail
  • AAA: use #ac2022 as the text (7.04:1)
Aaon black
3.21:1failpassfail
  • AA: use #da3437 as the text (4.53:1)
  • AAA: use #e67577 as the text (7.18:1)
  • AA: or shift the background to #d6d6d6 (4.5:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #b52124 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#b52124 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b52124
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 #b52124 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b52124-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