Presentation Deck Design - PowerPoint and Keynote Templates

I need branded PowerPoint and Keynote templates. Something with a few options to take images, video if needed, and of course written content that use the brand colour palette, and Content Copywriters logo, for me to use when putting slide decks together to present ideas, content, etc. to clients.

I prefer strong and simple to whizzy and fussy.

Here's a link to the company website: www.contentcopywriters.com to give you an idea of look and feel. The company colours are, Dark Slate Blue: RGB 43,56,86 and Rubber Ducky Yellow: RGB 255, 216, 1 plus black and white. Some logos are attached, and a PDF, to help give you a better idea. Thanks.