Color

#ff1f2a

#ff1f2a
hex#ff1f2a
rgbrgb(255, 31, 42)
hslhsl(357, 100%, 56%)
oklchoklch(0.638 0.248 26.6)
Closest name: red (#ff0000)Relative luminance 0.2241

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1ffff4

#ff1f9a · #ff841f

#2aff1f · #1f2aff

Split-complementary

Open in tool →

#1fff84 · #1f9aff

#9aff1f · #1ffff4 · #841fff

Contrast

#ff1f2a as textRatioAAAA largeAAAFix
Aaon white
3.83:1failpassfail
  • AA: use #eb000c as the text (4.63:1)
  • AAA: use #b30009 as the text (7.19:1)
  • AA: or shift the background to #1a1a1a (4.54:1)
Aaon black
5.48:1passpassfail
  • AAA: use #ff6169 as the text (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ff1f2a as the background.

Brands using this color

Fonts for this mood

#ff1f2a reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ff1f2a
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 #ff1f2a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff1f2a-c49f9c-62cb93-2d251f-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