Matching node.fillColor (SKShapeNode)

Question

I have 25 circles on screen each with a random colour that has been generated from the declared colours and each names 'CIRCLE_1', 'CIRCLE_2' etc.

When matching the node.fillColor with the pre-defined colours, only the Yellow returns a value. Everything else remains at 0.

Can't see what I'm doing wrong/missing.

let SDRed = SKColor(red: 255/255, green: 61/255, blue: 61/255, alpha: 1.0)
let SDBlue = SKColor(red: 0/255, green: 175/255, blue: 255/255, alpha: 1.0)
let SDYellow = SKColor(red: 255/255, green: 255/255, blue: 0/255, alpha: 1.0)
let SDOrange = SKColor(red: 255/255, green: 128/255, blue: 0/255, alpha: 1.0)
let SDPink = SKColor(red: 255/255, green: 105/255, blue: 180/255, alpha: 1.0)
let SDGreen = SKColor(red: 144/255, green: 238/255, blue: 144/255, alpha: 1.0)
let SDDodgerBlue = SKColor(red: 30/255, green: 144/255, blue: 255/255, alpha: 1.0)



func checkAllColoursAvailable() -> Bool {


    var yellow = 0
    var blue = 0
    var pink = 0
    var green = 0
    var red = 0
    var orange = 0


    enumerateChildNodes(withName: "CIRCLE_*", using:
        { (node, stop) -> Void in
            print((node as! SKShapeNode).name!)

            let col: SKColor = (node as! SKShapeNode).fillColor

            if col == SDYellow {
                yellow = yellow + 1
            } else if col == SDGreen {
                green = green + 1
            } else if col == SDDodgerBlue {
                blue = blue + 1
            } else if col == SDOrange {
                orange = orange + 1
            } else if col == SDRed {
                red = red  + 1
            } else if col == SDPink {
                pink = pink + 1
            }
    })


    if yellow >= 1 && blue >= 1 && green >= 1 && orange >= 1 && red >= 1 && pink >= 1 {
        return true
    } else {
        return false
    }
}