You can make the icon a different colour to the text by using the following:
icon.color: "blue"
I tend to have my own theme Item in QML that references Theme and adds any properties I need. I would then customise existing QML items with those properties.
For example, MyTheme.qml:
pragma Singleton
import Felgo 3.0
Item
{
property color iconColour: "blue" // New custom property
property var theme: Theme // Provides access to Theme so this item is the main point for all theme related stuff
}
And MySimpleRow.qml:
import Felgo 3.0
SimpleRow
{
icon.color: MyTheme.iconColour
}
Hope that helps