The filenames are organized as follows: ibr_logo_[colormode]_[style]_[language]_[group].
colormode is either cmyk or rgb. You should use cmyk if the document is going to be printed (e.g. LaTeX documents). For screen usage (websites, software, PowerPoint, LaTeX beamer) you should use the rgb version.
style is either missing, gray, or black. The version without style is full color, use this whenever applicable. The gray version is useful if you print your document on a black laser printer (e.g. for exams). Use the black version if only one color is available (e.g. on t-shirts).
language is either de or en. Choose the version that fits your document's language.
group is either missing, alg, cm, or vss. Use the version without a group if your document is relevant for the whole institute (e.g. door plates, institute website). Use the version of your group if applicable (e.g. on lecture slides, letters).
