This pic was taken last February in my garden, by minus 20 Celsius. The northern cardinal (Cardinalis cardinalis, don’t you love Latin!) and the dark-eyed junco (Junco hyemalis) seemed to observe a truce, in order to keep their energy. They nestled in the center of a wildrose bush invaded by the vines. The junco appears more blue than gray.
Below is a better view of the cardinal, before the approach of a squirrel had the two birds hopping away. (In this very dense foliage, none could immediately fly away.)
Those pics were taken through the windowpane, so the diminished/whitish colors were accentuated afterward in Gimp.