Can read .xlsx files with fill styles now

src/xlsx/xlsxutility.cpp

@@ -29,6 +29,7 @@
 #include <QRegularExpression>
 #include <QMap>
 #include <QStringList>
+#include <QColor>
 
 namespace QXlsx {
 
@@ -51,6 +52,16 @@ QStringList splitPath(const QString &path)
     return QStringList()<<path.left(idx)<<path.mid(idx+1);
 }
 
+QColor fromARGBString(const QString &c)
+{
+    Q_ASSERT(c.length() == 8);
+    QColor color;
+    color.setRed(c.mid(2, 2).toInt(0, 16));
+    color.setGreen(c.mid(4, 2).toInt(0, 16));
+    color.setBlue(c.mid(6, 2).toInt(0, 16));
+    return color;
+}
+
 QPoint xl_cell_to_rowcol(const QString &cell_str)
 {
     if (cell_str.isEmpty())