If you've upgraded to ePortal 13.3, but aren't really getting on well with the new blue colour scheme, then this post might be of use to you. When Advanced released this version of ePortal, they also bundled in some additional, yet unused, colour scheme image files. I've compiled some css files that make use of each of these colour image sets so that schools can have some control over the colour scheme that ePortal uses. Hopefully, one of these is close enough to your school's branding that you find it useful. As an aside, the colour schemes on offer here are those that are available in Progresso, so anyone planning on migrating might find it useful to pick out a colour scheme from this for when you go live! I've tried to ensure that these files amend the colours on all ePortal screens, but if you do find one that has slipped through with the default blue colour scheme, let me know! Also, please don't judge the css too harshly, I know it's full of kludgy !important rules, but I don't think there is any way around this.
I'll attach a preview of the colour scheme so you can decide which one looks best for you, along with a link to a .txt version of the css. You'll need to download this .txt file, rename it to .css and save it to your webapps/eportal/styles/custom folder, then edit the webapps/eportal/styles/ccmimport.css file and change the filename specified to your new css file. You should then be able to refresh your connection to ePortal (you do not need to restart services!) and the new colour scheme should take effect.