PowerPoint Theme Colours Test Pattern

A geometric composition of six colours, each colour corresponding to an accent in the Theme Colours of the presentation. The shapes of the composition are combined so that all six colours interact with each other. So you can see how well they match or not. Whether there are problems with contrast, you can immediately see in Grayscale mode. It is also convenient to present colour palette options to the client.
P.s. I added Text/Background Light and Dark accent colours as a sticky notes.