JavaFX Table Cell Progress Bar in CSS

Controller.java

import javafx.fxml.Initializable;
import javafx.scene.control.Slider;
import javafx.scene.control.TableCell;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;

import java.net.URL;
import java.util.ResourceBundle;

public class Controller implements Initializable {
    public TableView view;
    public Slider slider;
    private DataContainer model = new DataContainer();

    // <ModelType,ColumnType>
    public TableColumn<DataObject, Double> actionCell;

    @Override
    public void initialize(URL location, ResourceBundle resources) {
        model.stream().forEach(obj -> {
            obj.setName("asdf");
            obj.valueProperty().bind(slider.valueProperty());
        });

        view.setItems(model.getValue());

        //Whatever the "percent done" property is
        actionCell.setCellValueFactory(cell -> cell.getValue().valueProperty().asObject());

        actionCell.setCellFactory(column -> new TableCell<DataObject, Double>(){
            @Override
            protected void updateItem(Double item, boolean empty) {
                super.updateItem(item, empty);
                if(item != null && !empty){
                    setText(item.toString());

                    double percent = item * 100;

                    String color = "169f16";
                    if(percent > 90){
                        color = "ff0303";
                    }else if(percent > 75){
                        color = "ffd742";
                    }

                    setStyle("-fx-background-color: linear-gradient(from 0% 100% to " + (percent) +"% 100%, #" + color + ", #" + color + " 99.99%, transparent);");
                }
            }
        });
    }
}