According to the Japanese website Mac Otakara —as noted by AppleInsider — a Chinese supplier says the upcoming iPhone 7 will be available in dark blue, silver, gold and rose gold options.
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The article also says it’s “highly likely” that the space grey option will be no more. Finally, Mac Otakara says the iPhone 7 will use the same LCD glass as Apple’s current smartphones.
Chances that this rumor is true (IMHO): 50%. I can see Apple adding a dark blue color, but I don’t think the company will ditch the popular space grey hue.
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