Just found this site through Apple Discussions on Color, what a great idea! It would be really handy if, when you clicked on a grade, the thumbnails were a lot bigger, maybe a whole 720 or 640 wide or larger.

When you File > Export > JPEG still… in Color it resizes the image to 600 something by 400 something depending on aspect ratio. So full width isn’t possible but maybe slightly larger than today. We’ll look into it.

Sounds good! People could also do screenshots instead of exports (shift-cmd-4), but it’s a bit hard to get the corners just right.