Color

#ff0a37

#ff0a37
hex#ff0a37
rgbrgb(255, 10, 55)
hslhsl(349, 100%, 52%)
oklchoklch(0.633 0.253 23.1)
Closest name: red (#ff0000)Relative luminance 0.2175

Tints & shades

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

Harmonies

Complementary

Open in tool →

#0affd2

#ff0ab1 · #ff580a

#37ff0a · #0a37ff

Split-complementary

Open in tool →

#0aff58 · #0ab1ff

#b1ff0a · #0affd2 · #580aff

Contrast

#ff0a37 as textRatioAAAA largeAAAFix
Aaon white
3.92:1failpassfail
  • AA: use #eb002b as the text (4.6:1)
  • AAA: use #b30021 as the text (7.15:1)
  • AA: or shift the background to #171717 (4.57:1)
Aaon black
5.35:1passpassfail
  • AAA: use #ff5c7a as the text (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ff0a37 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

#ff0a37 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ff0a37
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 #ff0a37 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff0a37-c49c9f-62cb85-2d231f-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