code: @Override
      CssFormatter appendColor( double color, String hint ) {
          if( !inlineMode() ) {
              int red = ColorUtils.red( color );
              if( red % 17 == 0 ) {
                  int green = ColorUtils.green( color );
                  if( green % 17 == 0 ) {
                      int blue = ColorUtils.blue( color );
                      if( blue % 17 == 0 ) {
                          super.append( '#' )
                          .append( Character.forDigit( red / 17, 16 ) )
                          .append( Character.forDigit( green / 17, 16 ) )
                          .append( Character.forDigit( blue / 17, 16 ) );
                          return this;
                      }
                  }
              }
          }
          return super.appendColor( color, null );
      }
docs: Write a 3 digit color definition if possible.
  {@inheritDoc}