Color

#a90f2b

#a90f2b
hex#a90f2b
rgbrgb(169, 15, 43)
hslhsl(349, 84%, 36%)
oklchoklch(0.47 0.181 20.6)
Closest name: Blood Rush (#aa2222)Relative luminance 0.0895

Colors that go with #a90f2b

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.

Real palettes that use #a90f2b

Tints & shades

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

Harmonies

Complementary

Open in tool →

#0fa98d

#a90f78 · #a9400f

#2ba90f · #0f2ba9

Split-complementary

Open in tool →

#0fa940 · #0f78a9

#78a90f · #0fa98d · #400fa9

Contrast

#a90f2b as textRatioAAAA largeAAAFix
Aaon white
7.53:1passpasspassPasses AAA — no fix needed.
Aaon black
2.79:1failfailfail
  • AA: use #e6143a as the text (4.53:1)
  • AAA: use #f26982 as the text (7.12:1)
  • AA: or shift the background to #c9c9c9 (4.55:1)
  • AAA: or shift the background to #f7f7f7 (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #a90f2b as the background.

Brands using this color

Fonts for this mood

#a90f2b reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #a90f2b
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 #a90f2b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a90f2b-c49c9f-62cb85-2d231f-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