Color

#a01803

#a01803
hex#a01803
rgbrgb(160, 24, 3)
hslhsl(8, 96%, 32%)
oklchoklch(0.454 0.172 31.4)
Closest name: Bleeding Crimson (#9b1414)Relative luminance 0.0813

Colors that go with #a01803

Royal Blue, Teal and Champagne 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 →

#038ba0

#a0033d · #a06603

#03a018 · #1803a0

Split-complementary

Open in tool →

#03a066 · #033da0

#3da003 · #038ba0 · #6603a0

Contrast

#a01803 as textRatioAAAA largeAAAFix
Aaon white
7.99:1passpasspassPasses AAA — no fix needed.
Aaon black
2.63:1failfailfail
  • AA: use #e62305 as the text (4.61:1)
  • AAA: use #fb6750 as the text (7.16:1)
  • AA: or shift the background to #c4c4c4 (4.58:1)
  • AAA: or shift the background to #f0f0f0 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #a01803 as the background.

Brands using this color

Fonts for this mood

#a01803 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #a01803
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 #a01803 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a01803-c4a69c-62cba6-2d271f-f1e9ec?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