Fix explain colors in dark mode

pglab/querytool/QueryExplainModel.cpp

@@ -16,6 +16,7 @@ const int c_NumberOfColumns = 8;
 QueryExplainModel::QueryExplainModel(QObject *parent, ExplainRoot::SPtr exp)
 	: QAbstractItemModel(parent)
 	, explain(std::move(exp))
+    , theme(GetColorTheme())
 {}
 
 QVariant QueryExplainModel::data(const QModelIndex &index, int role) const
@@ -67,35 +68,35 @@ if (role == Qt::DisplayRole) {
 				if (tt > 0.000000001f) {
 					float f = t / tt;
 					if (f > 0.9f) {
-						result = QColor(255, 192, 192);
+                        result = theme.explainTime[0];
 					}
 					else if (f > 0.63f) {
-						result = QColor(255, 224, 192);
+                        result = theme.explainTime[1];
 					}
 					else if (f > 0.36f) {
-						result = QColor(255, 255, 192);
+                        result = theme.explainTime[2];
 					}
 					else if (f > 0.09f) {
-						result = QColor(255, 255, 224);
+                        result = theme.explainTime[3];
 					}
 					else {
-						result = QColor(Qt::white);
+                        result = {};
 					}
 				}
 			}
 			if (col == c_ColumnEstErr) {
 				float e = std::fabs(item->estimateError());
 				if (e > 1000.0f) {
-					result = QColor(255, 192, 192);
+                    result = theme.explainEstError[0];
 				}
 				else if (e > 100.0f) {
-					result = QColor(255, 224, 192);
+                    result = theme.explainEstError[1];
 				}
 				else if (e > 10.0f) {
-					result = QColor(255, 255, 192);
+                    result = theme.explainEstError[2];
 				}
 				else {
-					result = QColor(Qt::white);
+                    result = {}; //QColor(Qt::white);
 				}
 			}
 		}