Presentation Kit for Sketch

#1 Sketch's Plugin
You need to have Sketch 48.2+ version and Magic Mirror plugin.
Download and install a free plugin
Magic Mirror plugin
First of all, you need to turn on the plugin. To do so, open the Plugins → Magic Mirror 3 → Enable Magic Mirror
Find the “Change This” layer in the Layers’ panel, and you’ll see the Magic Mirror panel at your right side – then press the update button.
Click “↻”
Changeable Colors
You can change the color of each element in the “Change Color” or "Clay" artboards. Find and choose the “Change Color” layer, and you’ll be able to choose any color or gradient in the Fills panel.