Color

#b70104

#b70104
hex#b70104
rgbrgb(183, 1, 4)
hslhsl(359, 99%, 36%)
oklchoklch(0.49 0.2 28.8)
Closest name: Bullseye (#b9030a)Relative luminance 0.101

Tints & shades

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

Harmonies

Complementary

Open in tool →

#01b7b4

#b7015f · #b75901

#04b701 · #0104b7

Split-complementary

Open in tool →

#01b759 · #015fb7

#5fb701 · #01b7b4 · #5901b7

Contrast

#b70104 as textRatioAAAA largeAAAFix
Aaon white
6.95:1passpassfail
  • AAA: use #b20104 as the text (7.24:1)
Aaon black
3.02:1failpassfail
  • AA: use #ef0105 as the text (4.68:1)
  • AAA: use #fe6264 as the text (7.15:1)
  • AA: or shift the background to #d1d1d1 (4.55:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #b70104 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#b70104 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b70104
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 #b70104 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b70104-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