Color

#ba031b

#ba031b
hex#ba031b
rgbrgb(186, 3, 27)
hslhsl(352, 97%, 37%)
oklchoklch(0.498 0.201 25.5)
Closest name: Bullseye (#b9030a)Relative luminance 0.1058

Tints & shades

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

Harmonies

Complementary

Open in tool →

#03baa1

#ba0377 · #ba4603

#1bba03 · #031bba

Split-complementary

Open in tool →

#03ba46 · #0377ba

#77ba03 · #03baa1 · #4603ba

Contrast

#ba031b as textRatioAAAA largeAAAFix
Aaon white
6.74:1passpassfail
  • AAA: use #b5031a as the text (7.02:1)
Aaon black
3.12:1failpassfail
  • AA: use #ec0423 as the text (4.61:1)
  • AAA: use #fd5e73 as the text (7.03:1)
  • AA: or shift the background to #d4d4d4 (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 #ba031b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#ba031b reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ba031b
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 #ba031b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ba031b-c49c9d-62cb8a-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