Tks but this is not a solution in my environment :

  • my page is generated at runtime and then I can’t know a priori how many dropdown list I’ve, nor the id of each, nor how many items in each dropdown list, nor the color of each one and then I can’t use a js to do the job
  • not all items should be colored and each one could have its own color

The best solution, if possible, shoud be

<smart-list-item style=”background-color : myCololor;”> or something like that I can generate in a single shot.