chore: Update default variant contrast

src/themes/settings/specific/default.json

@@ -24,7 +24,7 @@
     "scrollbarsHover": "#00000030",
     "statusbarForeground": "#546E7A",
     "sidebarBackground": "#263238",
-    "sidebarForeground": "#546E7A",
+    "sidebarForeground": "#607a86",
     "listHoverForeground": "#FFFFFF",
     "listHoverBackground": "#263238",
     "tabActiveForeground": "#FFFFFF",

themes/Material-Theme-Default.json

@@ -714,7 +714,7 @@
     "tab.activeBorder": "#80CBC4",
     "tab.unfocusedActiveBorder": "#546E7A",
     "tab.activeForeground": "#FFFFFF",
-    "tab.inactiveForeground": "#546E7A",
+    "tab.inactiveForeground": "#607a86",
     "tab.inactiveBackground": "#263238",
     "tab.unfocusedActiveForeground": "#EEFFFF",
     "tab.border": "#263238",
@@ -734,7 +734,7 @@
     "titleBar.inactiveBackground": "#263238",
     "titleBar.inactiveForeground": "#546E7A",
     "sideBar.background": "#263238",
-    "sideBar.foreground": "#546E7A",
+    "sideBar.foreground": "#607a86",
     "sideBar.border": "#26323860",
     "titleBar.border": "#26323860",
     "sideBarTitle.foreground": "#EEFFFF",