The swatches in the mymobile theme are wired up like a Christmas Tree and very difficult to use - http://themeroller.jquerymobile.com/ - to add a another swatch. I did unpick the theme ages ago and produce a more manageable version - https://github.com/gjb2048/moodle-theme_moobile/tree/MOODLE_23 - but I have not updated it in ages as gone to using Bootstrap as the mobile solution.
The code is there if you want it, but no support, sorry.
Acctually i want to change ui-bar to red color, but the swatch is default. Any idea how to change it? i've try 2 step to modifiying style 1) im just only edit jmobile.css and change to swatch 'e' to red, after save n refresh webpage, nothing changed. step 2) copy the classes that define swatch a (lines 16-149) and paste into new CSS document and save in web folder. then links that swatch files to webpage, but could't..
Look in the PHP files.