Color

#b20124

#b20124
hex#b20124
rgbrgb(178, 1, 36)
hslhsl(348, 99%, 35%)
oklchoklch(0.482 0.194 22.7)
Closest name: All Systems Red (#b30103)Relative luminance 0.0961

Colors that go with #b20124

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 →

#01b28e

#b2017d · #b23601

#24b201 · #0124b2

Split-complementary

Open in tool →

#01b236 · #017db2

#7db201 · #01b28e · #3601b2

Contrast

#b20124 as textRatioAAAA largeAAAFix
Aaon white
7.18:1passpasspassPasses AAA — no fix needed.
Aaon black
2.92:1failfailfail
  • AA: use #e90130 as the text (4.51:1)
  • AAA: use #fe5d7d as the text (7.08:1)
  • AA: or shift the background to #cfcfcf (4.61:1)
  • AAA: or shift the background to #fcfcfc (7:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #b20124 as the background.

Brands using this color

Fonts for this mood

#b20124 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b20124
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 #b20124 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b20124-c49c9f-62cb83-2d231f-f1e9ef?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