VS Code 1.56 (April 2021) introduced new color tokens for keybinding labels.
These will be added to make them conform with Nord's theme style:

• keybindingLabel.background — keybinding label background color used to represent a keyboard shortcut.
• keybindingLabel.foreground — keybinding label foreground color used to represent a keyboard shortcut.
• keybindingLabel.border — keybinding label border color used to represent a keyboard shortcut.
• keybindingLabel.bottomBorder — keybinding label border bottom color used to represent a keyboard shortcut.