import controlP5.*;

ControlP5 controlP5;

void setup() {
  size(400,400);
  controlP5 = new ControlP5(this);
  controlP5.setColorLabel( color(200,0,0) );

  // this is the correct color
  Slider s = controlP5.addSlider("s_test", 0,100, 0, 20,20,100,15);

  // this is NOT the correct color
  Toggle t = controlP5.addToggle("t_Test", false, 20, 60, 15, 15);

  // but this is a temp fix (uncomment it to see it work) :
  //t.setColorLabel( color(200,0,0) );

  // this is NOT the correct color
  Radio r = controlP5.addRadio("r_Test", 20,110, 15,15, 20);
  r.add("A", 0);
  r.add("B", 1);

  // and this temp fix does NOT work:
  r.setColorLabel( color(200,0,0) );
}

void draw() {
  background(0);
}