I want to set the background color of a label in controlP5, but it seems something went wrong:

2.         final int backgroundColor = 0x99ffffff;
3.         int i = 0;
4.         for (final Slider slider : mSliders) {
5.             slider.setGroup(ctrl);
6.             slider.setId(i);
7.             final Label label = slider.getCaptionLabel();
8.             label.toUpperCase(true);
9.             label.setColorBackground(backgroundColor);
10.             final ControllerStyle style = label.getStyle();
11.             style.padding(4, 0, 1, 3);
12.             style.marginTop = -4;
13.             style.marginLeft = 0;
14.             style.marginRight = -14;
15.             slider.plugTo(mControl);
16.             i++;
17.         }

It should almost be white, but it's some kind of ugly blue (but this happened when update from 0.5.4 to 0.6.5 which I found via a web link 

kind regards,

Johannes