If Else not allowing color change?

I would like to have 3 If/Else If statements that change the color of a background depending on the value received. So Far my code is:

/////Activity Response Selection/////
@IBAction func ActivityAction(sender: AnyObject) {

    if(ActivitySeg.selectedSegmentIndex == 0)
    {
    ActivityVal.text = "Absent"
    ActivityNum.text = "0"
    }
    else if(ActivitySeg.selectedSegmentIndex == 1)
    {
    ActivityVal.text = "Arms/Legs Flexed"
    ActivityNum.text = "1"
    }
    else if(ActivitySeg.selectedSegmentIndex == 2)
    {
    ActivityVal.text = "Active Movement"
    ActivityNum.text = "2"
    }


let ActivityIn = Double(ActivityNum.text!)
let PulseIn = Double(PulseNum.text!)
let GrimIn = Double(GrimNum.text!)
let AppIn = Double(AppNum.text!)
let RespIn = Double(RespNum.text!)

let product = ActivityIn! + PulseIn! + GrimIn! + AppIn! + RespIn!

TotalVal.text = "\(product)"
TotalVal.text = NSString(format: "APGAR Score: %2.0f", product)as String


if product >= 7.0 {
    TotalVal.backgroundColor = UIColor.greenColor()
}
else if product <= 6.0{
    TotalVal.backgroundColor = UIColor.yellowColor()
}
else if product <= 3.0 {
    TotalVal.backgroundColor = UIColor.redColor()
}

}

Where I have any value greater/equal to 7 as free. Equal/Less than 6 is a yellow background. Equal/Less than 3 is a red background.

My problem lies that the applications will only utilize the Green and Yellow colors, completely ignoring the red. How can I active the red?