Thanks to possibility of selection of text colour and a background, change size it is possible to create a mode of reading optimum for eyes. (e-ink-reader.ru)
Great use of contrasting text colour and line thickness to differentiate between sets of information. (hloom.com)
Once open, the Theme Lab (as Adobe calls it) enables us to change the background colour, the icon colour, the main and secondary text colours. (8ipads.com)