Color

#ff243d

#ff243d
hex#ff243d
rgbrgb(255, 36, 61)
hslhsl(353, 100%, 57%)
oklchoklch(0.642 0.244 23.3)
Closest name: red (#ff0000)Relative luminance 0.2286

Tints & shades

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

Harmonies

Complementary

Open in tool →

#24ffe5

#ff24ab · #ff7824

#3dff24 · #243dff

Split-complementary

Open in tool →

#24ff78 · #24abff

#abff24 · #24ffe5 · #7824ff

Contrast

#ff243d as textRatioAAAA largeAAAFix
Aaon white
3.77:1failpassfail
  • AA: use #eb001b as the text (4.62:1)
  • AAA: use #b30015 as the text (7.17:1)
  • AA: or shift the background to #1c1c1c (4.52:1)
Aaon black
5.57:1passpassfail
  • AAA: use #ff5c6f as the text (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ff243d as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#ff243d reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ff243d
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 #ff243d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff243d-c49c9c-62cb8c-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