How to make ppt have a sense of technology?

Dark color reflects a noble sense of quality and has always been the first choice in science and technology. Over time, the dark color system is a symbol of the wind of science and technology. Major technology companies always choose dark color as PPT background, such as pure black, dark blue or deep gradient. When we make PPT, we can also choose a suitable dark color as the PPT background, which makes people feel cool at first glance.