Get the color, and your design will change qualitatively. But you need to master hue, lightness, and chroma, and you have to understand how science works. Is there a new way? some.
Find works similar to or similar to your design, get its color scheme, and use it directly in your design. For example, the color scheme of this work is like this; this picture is like this. You can simply understand that a work uses these colors (in fact, more than that).
If you think the color scheme of this work is very suitable for one of your PPT themes, you can use it directly in your design.
We need a tool-a color picker (color picker). There are many commonly used software, such as PPT, PPT plug-in iSlide, commonly used screenshot artifact Snipaste, designer companion Photoshop …
Video source: Topbook.cc