Color

#ff1500

#ff1500
hex#ff1500
rgbrgb(255, 21, 0)
hslhsl(5, 100%, 50%)
oklchoklch(0.632 0.254 30)
Closest name: red (#ff0000)Relative luminance 0.218

Tints & shades

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

Harmonies

Complementary

Open in tool →

#00eaff

#ff006a · #ff9500

#00ff15 · #1500ff

Split-complementary

Open in tool →

#00ff95 · #006aff

#6aff00 · #00eaff · #9500ff

Contrast

#ff1500 as textRatioAAAA largeAAAFix
Aaon white
3.92:1failpassfail
  • AA: use #eb1400 as the text (4.53:1)
  • AAA: use #b30f00 as the text (7.04:1)
  • AA: or shift the background to #171717 (4.58:1)
Aaon black
5.36:1passpassfail
  • AAA: use #ff6052 as the text (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ff1500 as the background.

Brands using this color

Fonts for this mood

#ff1500 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ff1500
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 #ff1500 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff1500-c4a49c-62cba1-2d261f-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