Color

#b8001f

#b8001f
hex#b8001f
rgbrgb(184, 0, 31)
hslhsl(350, 100%, 36%)
oklchoklch(0.493 0.2 24.3)
Closest name: Bullseye (#b9030a)Relative luminance 0.1029

Colors that go with #b8001f

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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#00b899

#b8007a · #b83d00

#1fb800 · #001fb8

Split-complementary

Open in tool →

#00b83d · #007ab8

#7ab800 · #00b899 · #3d00b8

Contrast

#b8001f as textRatioAAAA largeAAAFix
Aaon white
6.87:1passpassfail
  • AAA: use #b3001e as the text (7.15:1)
Aaon black
3.06:1failpassfail
  • AA: use #eb0027 as the text (4.56:1)
  • AAA: use #ff5c77 as the text (7.05:1)
  • AA: or shift the background to #d4d4d4 (4.63:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #b8001f as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#b8001f reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b8001f
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 #b8001f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b8001f-c49c9e-62cb87-2d231f-f1e9ee?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