050 is a bone white
There is no Appliance white .
If you look at the Glasurit mix charts , you will see the colors they use in the mix
If it were a pure white [which I assume is Appliance] , it would only use weiss in the mix.
The pictures on ebay , or anywhere else, are hard to tell cuz the ones taken in the sun look very bright, but the shade ones seem to be truer ...
If you look at the Painscratch charts, you can see the bone/antique hue of 050 and you can see the gray hue of the 717...