You can style some buttons with your own custom css class. There are different ways to do this.
Dataview/Datagrid Add a class to your dataview and then you can add specific styling by using something like this:
.yourcustomcssclass .tundra .mendixButtonbutton .mendixButtoncontent {
color: red;
}
This will apply for default and custom microflow buttons in your control bar and microflow triggers in you dataview.
Microflow triggers You can also add a class to a microflow trigger.
Use the class property. Style in inline CSS, class refers to styles in an external CSS file.
Sorted it out self. Thanks