'vscode - change highlight color of current file

How can I add a custom style for the background of the opened file (the pale-grey behind fetch.js):

Solution 1:^[1]

I believe you are looking for the list.inactiveSelectionBackground theme setting. You can set this using workbench.colorCustomizations

"workbench.colorCustomizations": {
    "list.inactiveSelectionBackground": "#f0f"
}

This color used used when the explorer is not focused. Use list.activeSelectionBackground for when the explorer is focused

To highlight the current file tab on top -

Under Settings --> "workbench.colorCustomizations", add some colors to the tab border and/or to the tab background:

"tab.activeBorder": "#ff0000",
"tab.unfocusedActiveBorder": "#000000",
"tab.activeBackground": "#4a4a75",
"tab.unfocusedactiveBackground": "#000000"

I think that you can find the solution to this problem right here:

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