Color

#f0210a

#f0210a
hex#f0210a
rgbrgb(240, 33, 10)
hslhsl(6, 92%, 49%)
oklchoklch(0.609 0.237 30.4)
Closest name: Assassin’s Red (#f60206)Relative luminance 0.1963

Tints & shades

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

Harmonies

Complementary

Open in tool →

#0ad9f0

#f00a66 · #f0940a

#0af021 · #210af0

Split-complementary

Open in tool →

#0af094 · #0a66f0

#66f00a · #0ad9f0 · #940af0

Contrast

#f0210a as textRatioAAAA largeAAAFix
Aaon white
4.26:1failpassfail
  • AA: use #e6200a as the text (4.59:1)
  • AAA: use #b01807 as the text (7.05:1)
  • AA: or shift the background to #0d0d0d (4.56:1)
Aaon black
4.93:1passpassfail
  • AAA: use #f86859 as the text (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #f0210a as the background.

Brands using this color

Fonts for this mood

#f0210a reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #f0210a
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 #f0210a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f0210a-c4a59c-62cba3-2d271f-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