> let color : Color? = getFavoriteColor()
> if color != nil {
>       // Color is no longer an Optional
> }
well, I'd just write
if let color = getFavoriteColor() {…

This even more as the other solutions hide that "color" isn't the original 
"color" anymore inside the braces:
The first one was an Optional, the second one isn't.

Tino
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