Screenshot, Source: developer.kde.org
Excerpt:
The following list of guidelines is laid down to help you draw icons that fit in with the K Desktop Environment.
- For low-color icons, it is mandatory to use the 40 colour KDE icon palette presented below.
- Draw application and filetype icons in hicolor 48×48 and 32×32 sizes as well as low-color 32×32 and 16×16 sizes. Toolbar icons should be size 22×22.
- Outline the major shapes in the icon in black. Give every shape a clean, hard edge.
- Use the corresponding filetype templates as a base for new filetype icons.
- Make the background of the icons transparent.
- Look over the supplied KDE icons to get an idea of the style used.
Related Links:
KDE Icon Style Guide