Get Most Common Element in Array

main.swift

var colorArray = ["blue", "white", "yellow", "red","blue", "white", "yellow", "red","blue", "white", "yellow", "red","blue", "white", "yellow", "red","blue", "white", "yellow", "red","yellow", "red","yellow", "red","yellow", "red", "red"]

func getMostColor(input: [String]) -> String{
    var topColor: String = ""
    var colorDict: [String:Int] = [:]

    for color in input{
        colorDict[color, default:0]+=1
    }

    let highestValues = colorDict.values.max()

    for (color, count) in colorDict{
        if colorDict[color] == highestValues{
            topColor = color
        }
    }
    return topColor
}

getMostColor(input: colorArray)