code: public void setIconColor(@ColorInt int color){
          mEmptyIconColor = color;
          if (mEmptyIconColor != -1) {
              mIcon.setColorFilter(mEmptyIconColor, PorterDuff.Mode.SRC_IN);
          } else {
              mIcon.clearColorFilter();
          }
      }
docs: Set the color of the icon
  
  @param color     the icon color to tint with