Color

#a40a04

#a40a04
hex#a40a04
rgbrgb(164, 10, 4)
hslhsl(2, 95%, 33%)
oklchoklch(0.455 0.182 29.5)
Closest name: Bleeding Crimson (#9b1414)Relative luminance 0.0812

Tints & shades

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

Harmonies

Complementary

Open in tool →

#049fa4

#a4044f · #a45904

#04a40a · #0a04a4

Split-complementary

Open in tool →

#04a459 · #044fa4

#4fa404 · #049fa4 · #5904a4

Contrast

#a40a04 as textRatioAAAA largeAAAFix
Aaon white
8:1passpasspassPasses AAA — no fix needed.
Aaon black
2.62:1failfailfail
  • AA: use #ea0e06 as the text (4.56:1)
  • AAA: use #fb6560 as the text (7.13:1)
  • AA: or shift the background to #c4c4c4 (4.59:1)
  • 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 #a40a04 as the background.

Brands using this color

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

Fonts for this mood

#a40a04 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #a40a04
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 #a40a04 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a40a04-c4a29c-62cb9c-2d261f-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