Drab winter day?
In my world, no day looks drab or dreary to me. Atmospheric, damp, wet, or subdued, or monochromatic, maybe, but not drab. Even in winter I still see green in the grass and occasional colonies of vivid emerald-green moss.
Maybe because I used to do oil painting, I see so many hues on a "drab" day. Shades of lavender, pink, red, green, gold, burnt umber, raw sienna...