LibGUI: More system theme support in GTabWidget and GTableView

Libraries/LibGUI/GTabWidget.cpp

@@ -124,7 +124,7 @@ void GTabWidget::paint_event(GPaintEvent& event)
         bool hovered = i == m_hovered_tab_index;
         auto button_rect = this->button_rect(i);
         StylePainter::paint_tab_button(painter, button_rect, false, hovered, m_tabs[i].widget->is_enabled());
-        painter.draw_text(button_rect.translated(0, 1), m_tabs[i].title, TextAlignment::Center);
+        painter.draw_text(button_rect.translated(0, 1), m_tabs[i].title, TextAlignment::Center, SystemColor::ButtonText);
     }
 
     for (int i = 0; i < m_tabs.size(); ++i) {
@@ -133,8 +133,8 @@ void GTabWidget::paint_event(GPaintEvent& event)
         bool hovered = i == m_hovered_tab_index;
         auto button_rect = this->button_rect(i);
         StylePainter::paint_tab_button(painter, button_rect, true, hovered, m_tabs[i].widget->is_enabled());
-        painter.draw_text(button_rect.translated(0, 1), m_tabs[i].title, TextAlignment::Center);
-        painter.draw_line(button_rect.bottom_left().translated(1, 1), button_rect.bottom_right().translated(-1, 1), background_color());
+        painter.draw_text(button_rect.translated(0, 1), m_tabs[i].title, TextAlignment::Center, SystemColor::ButtonText);
+        painter.draw_line(button_rect.bottom_left().translated(1, 1), button_rect.bottom_right().translated(-1, 1), SystemColor::Button);
         break;
     }
 }

Libraries/LibGUI/GTableView.cpp

@@ -57,11 +57,11 @@ void GTableView::paint_event(GPaintEvent& event)
             key_column_background_color = is_focused() ? Color::from_rgb(0x84351a) : Color::from_rgb(0x606060);
         } else {
             if (alternating_row_colors() && (painted_item_index % 2)) {
-                background_color = Color(220, 220, 220);
-                key_column_background_color = Color(200, 200, 200);
+                background_color = Color(SystemColor::Base).darkened(0.8f);
+                key_column_background_color = Color(SystemColor::Base).darkened(0.7f);
             } else {
                 background_color = SystemColor::Base;
-                key_column_background_color = Color(220, 220, 220);
+                key_column_background_color = Color(SystemColor::Base).darkened(0.9f);
             }
         }
         painter.fill_rect(row_rect(painted_item_index), background_color);