src/vs/base/browser/ui/checkbox/checkbox.ts/SimpleCheckbox/applyStyles
class SimpleCheckbox:	protected applyStyles(): void {
		this.domNode.style.color = this.styles.checkboxForeground ? this.styles.checkboxForeground.toString() : '';
		this.domNode.style.backgroundColor = this.styles.checkboxBackground ? this.styles.checkboxBackground.toString() : '';
		this.domNode.style.borderColor = this.styles.checkboxBorder ? this.styles.checkboxBorder.toString() : '';
	}