Use color for selected NSTableRowView

RowView.swift

import Cocoa

class ThreadsListItemRowView: NSTableRowView {

    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)
        if isSelected == true {
            NSColor(hexFromString: "#ff9800").set()
            dirtyRect.fill()
        }
        // Drawing code here.
    }
    
}
extension NSColor {
    convenience init(hexFromString:String, alpha:CGFloat = 1.0) {
        var cString:String = hexFromString.trimmingCharacters(in: .whitespacesAndNewlines).uppercased()
        var rgbValue:UInt32 = 10066329 //color #999999 if string has wrong format
        
        if (cString.hasPrefix("#")) {
            cString.remove(at: cString.startIndex)
        }
        
        if ((cString.count) == 6) {
            Scanner(string: cString).scanHexInt32(&rgbValue)
        }
        
        self.init(
            red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,
            green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,
            blue: CGFloat(rgbValue & 0x0000FF) / 255.0,
            alpha: alpha
        )
    }
}