"workbench.colorCustomizations": {
"titleBar.border": "#000",
"sideBar.border": "#000",
"activityBar.border": "#000",
"tab.border": "#000",
"editorGroupHeader.tabsBorder": "#000",
"panel.border": "#000",
"statusBar.border": "#000"
},
"workbench.colorCustomizations": {
"titleBar.border": "#05080A",
"list.activeSelectionBackground": "#05080A",
"list.inactiveSelectionBackground": "#05080A",
"tab.inactiveBackground": "#05080A",
"editorGroupHeader.tabsBackground": "#05080A",
"editorGroupHeader.noTabsBackground": "#05080A",
"activityBar.background": "#05080A",
"sideBar.background": "#05080A",
"sideBarSectionHeader.background": "#05080A",
"activityBar.border": "#0b1015",
"tab.border": "#0b1015",
"panel.border": "#05080A",
"statusBar.border": "#05080A"
},
Enjoy!