library/src/main/java/com/github/clans/fab/FloatingActionButton.java
public void setLabelColors(int colorNormal, int colorPressed, int colorRipple) {
        Label label = getLabelView();

        int left = label.getPaddingLeft();
        int top = label.getPaddingTop();
        int right = label.getPaddingRight();
        int bottom = label.getPaddingBottom();

        label.setColors(colorNormal, colorPressed, colorRipple);
        label.updateBackground();
        label.setPadding(left, top, right, bottom);
    }
public void setLabelColors(int colorNormal, int colorPressed, int colorRipple) {
        Label label = getLabelView();

        int left = label.getPaddingLeft();
        int top = label.getPaddingTop();
        int right = label.getPaddingRight();
        int bottom = label.getPaddingBottom();

        label.setColors(colorNormal, colorPressed, colorRipple);
        label.updateBackground();
        label.setPadding(left, top, right, bottom);
    }
Set the label's background colors