Obviously it will come down to how much white is being displayed and at what brightness etc.
But it is pretty obvious that white does use considerably more power on SAMOLED thus it is going to have some effect on battery life considering the screen is the biggest drainer on any phone.
http://en.wikipedia.org/wiki/OLED
And again if SAMOLED phones are doing crap compared to LCD in the browsing test on gsmarena's site then it does play a very large part.
As for blue, well supposedly that is the second worse colour for power consumption on SAMOLED screens, however, the blue used in google music is pretty dark, I imagine they mean the more bright blue i.e. sky blue etc.
My point wasn't about the white being used in google music or how long you have google music opened etc., simply replying to your comment about the "general" power consumption of white:
But it is pretty obvious that white does use considerably more power on SAMOLED thus it is going to have some effect on battery life considering the screen is the biggest drainer on any phone.
http://en.wikipedia.org/wiki/OLED
While an OLED will consume around 40% of the power of an LCD displaying an image which is primarily black, for the majority of images it will consume 60–80% of the power of an LCD: however it can use over three times as much power to display an image with a white background such as a document or website.[68] This can lead to reduced real-world battery life in mobile devices when white backgrounds are used.
And again if SAMOLED phones are doing crap compared to LCD in the browsing test on gsmarena's site then it does play a very large part.
As for blue, well supposedly that is the second worse colour for power consumption on SAMOLED screens, however, the blue used in google music is pretty dark, I imagine they mean the more bright blue i.e. sky blue etc.
My point wasn't about the white being used in google music or how long you have google music opened etc., simply replying to your comment about the "general" power consumption of white:
The whole 'white uses more battery' is overplayed in my opinion.