Swift PDFKit generate PDF with opaque background

I'm trying to generate a pdf with a transparent background for vector graphics and I've tried everything google has suggested, but I still keep getting a white background every time.

Filling the page with clear color didn't seem to work, and I couldn't figure out how to set the background of the page.

Any thoughts?

func draw() -> Data {
        
        let metadata = []

        let format = UIGraphicsPDFRendererFormat()        
        format.documentInfo = metadata as [String: Any]


        let pageWidth = 3 * 72.0
        let pageHeight = 3 * 72.0
        let pageRect = CGRect(x: 0, y: 0, width: pageWidth, height: pageHeight)
        let renderer = UIGraphicsPDFRenderer(bounds: pageRect, format: format)
        
        let data = renderer.pdfData { (context) in
            context.beginPage()
            let currentContext = UIGraphicsGetCurrentContext()
            currentContext?.setFillColor(UIColor.clear.cgColor)
            currentContext?.fill(pageRect)


            let circlePath = UIBezierPath(arcCenter: CGPoint(x: pageWidth / 2, y: pageHeight / 2), radius: CGFloat(100), startAngle: CGFloat(0), endAngle: CGFloat(Double.pi * 2), clockwise: true)
            UIColor.init(cgColor: colors[0].cgColor).setFill();
            UIColor.init(cgColor: colors[0].cgColor).setStroke();
            circlePath.fill()
            circlePath.stroke()
            
            
            }

        let documentsPath = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0]

        do {
            try data.write(to: URL(fileURLWithPath: "\(documentsPath)/file.pdf"))
        } catch {
            print(error)
        }

        return data
    }