A decade ago, a company's look & feel could be tightly controlled by the corporate communications department, with tight brand guidelines and consistently executed print advertising.
Today that design capability is fragmenting: PowerPoint presentations, product PDFs, web pages, mobile apps. Design is everywhere. Especially in large corporates that span multiple countries/continents it becomes hard to find what the corporate language actually is.
When in doubt, I revert to the corporate web page to get inspiration for a PowerPoint design.
Art: Gerard van Honthorst, The Concert, 1623