Use a predefined color scheme
In default Predefined Color Scheme is enabled. violet is the primary color in the theme which can be replaced with any other color via theme options.
By adding custom code you can change your own color as the primary color.For that you have to navigate to Sinbad > Styling > and switch off to “Use pre-defined color” and enter the color of your choice.
Main Theme Color
Totally there are 4 colors available in the theme.Violet is the primary color which can be replaced with any other color via theme options.