A color scheme is a set of coordinated colors used across different elements of your store.
In the Pebble theme, a color scheme can control:
Background
Background secondary
Text
Subtext
Border
Sale price
Primary button
Secondary button
Inputs (form fields)
Swatches (color swatch borders)
Notifications (Success, Error, Warning, Info, Out of Stock)
Progress bar
You can define different color schemes in your theme settings and apply the color schemes to different sections throughout your online store, using a color scheme picker.