src/vs/workbench/contrib/debug/browser/debugToolBar.ts/DebugToolBar/updateStyles
class DebugToolBar:	override updateStyles(): void {
		super.updateStyles();

		if (this.$el) {
			this.$el.style.backgroundColor = this.getColor(debugToolBarBackground) || '';

			const widgetShadowColor = this.getColor(widgetShadow);
			this.$el.style.boxShadow = widgetShadowColor ? `0 0 8px 2px ${widgetShadowColor}` : '';

			const contrastBorderColor = this.getColor(contrastBorder);
			const borderColor = this.getColor(debugToolBarBorder);

			if (contrastBorderColor) {
				this.$el.style.border = `1px solid ${contrastBorderColor}`;
			} else {
				this.$el.style.border = borderColor ? `solid ${borderColor}` : 'none';
				this.$el.style.border = '1px 0';
			}
		}
	}