Color

#f00515

#f00515
hex#f00515
rgbrgb(240, 5, 21)
hslhsl(356, 96%, 48%)
oklchoklch(0.601 0.244 27.9)
Closest name: Alarm (#ec0003)Relative luminance 0.1869

Tints & shades

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

Harmonies

Complementary

Open in tool →

#05f0e0

#f0058a · #f06b05

#15f005 · #0515f0

Split-complementary

Open in tool →

#05f06b · #058af0

#8af005 · #05f0e0 · #6b05f0

Contrast

#f00515 as textRatioAAAA largeAAAFix
Aaon white
4.43:1failpassfail
  • AA: use #eb0514 as the text (4.6:1)
  • AAA: use #b4040f as the text (7.08:1)
  • AA: or shift the background to #080808 (4.52:1)
Aaon black
4.74:1passpassfail
  • AAA: use #fc646e as the text (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #f00515 as the background.

Brands using this color

Fonts for this mood

#f00515 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #f00515
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 #f00515 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f00515-c49e9c-62cb91-2d241f-f1e9ee?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