How to create custom theme common to all my sencha application

Hi All,



I am currently using Sencha Architect 3.0 licensed version for developing Sencha Touch app and ExtJS app. I would like to create custom theme, which will be common and used in all my sencha touch applications (as well for ExtJS also), like font-family, font-color, form field labels, form field input, list padding, list border color.



How is this possible?



--Sridhar