请问下面报错如何解决

// Playground - noun: a place where people can play

import UIKit

let colors = [

    "Air Force Blue":(red: 93.0, green: 138.0, blue: 168.0),

    "Bittersweet":(red: 254.0, green: 111.0, blue: 94.0),

    "Canary Yellow":(red: 255.0, green: 239.0, blue: 0.0)

]

for (colorName,rgbColor) in colors {

    var color = UIColor(red: rgbColor.red, green: rgbColor.green, blue: rgbColor.blue, alpha:1.0)

}

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xcode 6.1

Playground execution failed: <EXPR>:19:24: error: extra argument 'green' in call

UIColor 初始化参数直接写值没问题，传入参数就报错