This was an interesting thread... However, I have to disagree about MS-Office logos and Lawson logos. The Lawson system when using ESS and MSS is an HR portal that should display your Company image. It has much more to do with your delivery of information to associates then some of the other "business" systems.
While an argument could easily be made that Lawson should be viewed as any other business system - I have found that HR systems that have portals for employees usually are viewed as your HR brand. If you build any other system and include your company logos and colors then the Lawson system looks out of place and you get questions about why a system that costs hundreds of thousands can't easily provide a pleasent front end that syncs with other systems.
(I hate that I have a bunch of different systems that make our information delivery a bit schizophrenic in thier branding.)
Very helpful info. The lawform.css has changed quite a bit since 2012, but the basic change is the same.
Here is what we did to change the background color to 'pink': search for div.mainStyle and add the highlighted line.