In the WordPress dashboard go to the Appearance submenu and click on Customize.
After clicking on customize you will in theme Customizer.
Here you have to click on the Style Configurator.
Here you have to click on the Make Own Theme Color
Choose Color for Startweb #FFD200
Here you will change the Change Theme Color.
Go to Customize -> Style Configurator ->
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In the WordPress dashboard go to the Appearance submenu and click on Customize.
After clicking on customize you will in theme Customizer.
Here you have to click on the Frontpage.
You have to click on the Service Section.
Here you will Select First Service.
Go to Customize -> Frontpage -> Service Section