Logos can be found on the Debian logo guidelines page at: https://www.debian.org/logos/
The official logos have been selected by vote of the Debian developers in Mid 1999.
They have been created by Raul M. Silva (http://www.silva.com)
Get banners to show your Debian pride at:
The red color
The red color has defined pantone values as you can read at this page archived in the WayBackMachine.
The red used in the font is nominally PANTONE Rubine Red 2X CVC, however PANTONE has deprecated both double-impression (inked, dried, inked again) samples, indicated by the 2X, and Computer Video / Coated samples (indicated by the CVC), replacing them with just Coated (C) swatches. Therefore, the up-to-date equivalent is either Strong Red C (rendered in RGB as #CC0066 or #CE0056) or Rubine Red C (the C is perhaps not necessary, as all materials [C, HC, PC, U, UP, CP, EC, M] render as #CA005D in RGB, or #CE0058).
The official SVG at https://www.debian.org/logos/openlogo-nd.svg uses #A80030 as filling color
- Other equivalents of the red include:
CMYK - 15%, 96%, 67%, 1% - conversion by Adobe Illustrator 8.0 from Pantone color name, taken from this message archived in the WayBackMachine
RGB - 215, 10, 83 - conversion by Gimp and by an online tool
RGB web safe - 221, 17, 85 - conversion by Gimp and by an online tool
HEX - #d70a53 - conversion by Gimp (a color which by the way seems to be called "Debian Red" officially, see e.g. this page)
- HEX web safe - #DD1155 (#D15) - conversion by Gimp
The font used to write "Debian" in the logo is a commercial paid font (see this discussion in the debian-desktop mailing-list) called Poppl Laudatio Condensed. The i-Dot has been manually replaced by a red diamond. Julien Blache annotated that the text has been condensed horizontally and stretched vertically. The "debian" text can be found in vector format at qui.
There was also a similar free font at http://www.flyerstarter.com/Free-Fonts/L/Laudatio-C.html, it is still possible to find it here.
The Debian Logo is Open Source Brand, (Wikpedia page on Open-source brands). So there are several versions adapted from the Debian Swirl. You can use the spiral in color and style that you feel satisfied or your community Debian.