There probably is a warm shift to the photo, but that’s not enough to account for the colors we’re seeing on the monitor.
There’s no way you get that color yellow background and that color blue for the logo with a cool color temp.
That doesn’t necessarily mean that they were targeting the standards that are popularly assumed to be what they were following.
I’d love to see some direct quotes or solid evidence regarding color temperatures. The connection between broadcasting standards in place at the time and whatever pixel artists were doing always seemed a bit tenuous to me.
I was speculating that one of the reasons for the shift to a blue sky in later iterations of SMB could be that they were using photographs of CRTs as a reference- every time I try to take a photo of that purple sky, it always comes out blue. That and just, you know, the sky is blue.