Color

#ff1a1a

#ff1a1a
hex#ff1a1a
rgbrgb(255, 26, 26)
hslhsl(0, 100%, 55%)
oklchoklch(0.635 0.251 28.4)
Closest name: red (#ff0000)Relative luminance 0.2207

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1affff

#ff1a8c · #ff8c1a

#1aff1a · #1a1aff

Split-complementary

Open in tool →

#1aff8c · #1a8cff

#8cff1a · #1affff · #8c1aff

Contrast

#ff1a1a as textRatioAAAA largeAAAFix
Aaon white
3.88:1failpassfail
  • AA: use #eb0000 as the text (4.63:1)
  • AAA: use #b30000 as the text (7.2:1)
  • AA: or shift the background to #171717 (4.62:1)
Aaon black
5.41:1passpassfail
  • AAA: use #ff6161 as the text (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ff1a1a as the background.

Brands using this color

Fonts for this mood

#ff1a1a reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ff1a1a
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 #ff1a1a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff1a1a-c4a19c-62cb98-2d251f-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