Color

#dd0307

#dd0307
hex#dd0307
rgbrgb(221, 3, 7)
hslhsl(359, 97%, 44%)
oklchoklch(0.564 0.23 28.8)
Closest name: Angry Tomato (#d82029)Relative luminance 0.1545

Tints & shades

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

Harmonies

Complementary

Open in tool →

#03ddd9

#dd0374 · #dd6d03

#07dd03 · #0307dd

Split-complementary

Open in tool →

#03dd6d · #0374dd

#74dd03 · #03ddd9 · #6d03dd

Contrast

#dd0307 as textRatioAAAA largeAAAFix
Aaon white
5.13:1passpassfail
  • AAA: use #b50306 as the text (7.05:1)
Aaon black
4.09:1failpassfail
  • AA: use #ec0407 as the text (4.59:1)
  • AAA: use #fd6366 as the text (7.15:1)
  • AA: or shift the background to #f0f0f0 (4.5:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #dd0307 as the background.

Brands using this color

Fonts for this mood

#dd0307 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #dd0307
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 #dd0307 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/dd0307-c4a09c-62cb96-2d251f-f1e9ed?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