Color is automatically applied throughout the deck, by choosing a color Palette. You will find a list of Palettes with different color combinations in the presentation editor.
The Color Sets within the palettes are designed to ensure a good result, making things easier for you. You'll find the Palette button on the top side of the editor, to see the list of available options.
Colors will be automatically sorted throughout slides, using the different sets to ensure variety. You can change the color combination for each individual slide, by choosing a different Color Set.
For that, go to Background in the upper settings menu bar. Within the background settings, find the Color Sets and try them out. This will change color only for the selected slide.
Creating a Custom Palette
If you're a Premium subscriber, you can create custom Palettes and handpick your colors. When you go to the Palette settings, just hit the "+ New Palette" button.
Your palette can have up to three different Sets and each set can have three different colors. You are able to choose colors for: texts, backgrounds, and other graphic highlights. To set up a color, just click on it to access the color wheel or type in its HEX code.
Finally save it and be able to access it from the Palette options in the editor, even for other presentations. You can also hit the pencil icon button to edit the palette from here.