code: @CheckReturnValue
      public RoleAction setColor(Color color)
      {
          return this.setColor(color != null ? color.getRGB() : null);
      }
docs: Sets the color which the new role should be displayed with.
  
  @param  color
  An {@link java.awt.Color Color} for the new role, null to use default white/black
  
  @return The current RoleAction, for chaining convenience