Color

#ff2b05

#ff2b05
hex#ff2b05
rgbrgb(255, 43, 5)
hslhsl(9, 100%, 51%)
oklchoklch(0.642 0.245 31.4)
Closest name: red (#ff0000)Relative luminance 0.23

Tints & shades

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

Harmonies

Complementary

Open in tool →

#05daff

#ff055d · #ffa805

#05ff2b · #2b05ff

Split-complementary

Open in tool →

#05ffa8 · #055dff

#5dff05 · #05daff · #a805ff

Contrast

#ff2b05 as textRatioAAAA largeAAAFix
Aaon white
3.75:1failpassfail
  • AA: use #e62200 as the text (4.57:1)
  • AAA: use #ad1a00 as the text (7.18:1)
  • AA: or shift the background to #1c1c1c (4.54:1)
Aaon black
5.6:1passpassfail
  • AAA: use #ff6347 as the text (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ff2b05 as the background.

Brands using this color

Fonts for this mood

#ff2b05 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ff2b05
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 #ff2b05 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff2b05-c4a79c-62cba8-2d271f-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