code: @NonNull
      public IconicsDrawable color(@NonNull ColorStateList colors) {
          if (colors != null) {
              mIconBrush.setColors(colors);
              if (mIconBrush.applyState(getState())) {
                  invalidateSelf();
              }
          }
          return this;
      }
docs: Set the color of the drawable.
  
  @param colors The color, usually from android.graphics.Color or 0xFF012345.
  @return The current IconicsDrawable for chaining.