Color

#b5303e

#b5303e
hex#b5303e
rgbrgb(181, 48, 62)
hslhsl(354, 58%, 45%)
oklchoklch(0.518 0.169 19.8)
Closest name: Amore (#ae2f48)Relative luminance 0.1229

Colors that go with #b5303e

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.

Real palettes that use #b5303e

Tints & shades

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

Harmonies

Complementary

Open in tool →

#30b5a8

#b53080 · #b56530

#3eb530 · #303eb5

Split-complementary

Open in tool →

#30b565 · #3080b5

#80b530 · #30b5a8 · #6530b5

Contrast

#b5303e as textRatioAAAA largeAAAFix
Aaon white
6.07:1passpassfail
  • AAA: use #a12b37 as the text (7.2:1)
Aaon black
3.46:1failpassfail
  • AA: use #ce4653 as the text (4.63:1)
  • AAA: use #dc7a84 as the text (7.16:1)
  • AA: or shift the background to #dedede (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #b5303e as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Palettes built around it

Fonts for this mood

#b5303e reads as warm. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b5303e
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 #b5303e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b5303e-c49d9c-62cb8e-2d241f-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