In just three lines, this haiku-like poem catches a moment of change. Snow has started to fall, and it veils the landscape so that the autumn colors, already dull ("drab"), are only half visible. The title, "Just now," tells us the speaker is noticing this as it happens, not looking back on it.
The speaker seems quietly observant rather than upset or delighted. Calling the autumn color "drab" is a plain, almost deflating word, since we usually expect autumn to be glowing with reds and golds. Here the season is already faded, and the snow is gently erasing what's left. The dash before the last line makes us pause, then lands on that muted image.
The mood is hushed and in-between: one season slipping into another, neither fully present. There's a little melancholy in it, but also calm, as if the speaker is simply watching the world quietly shift.