Something around Graves for Lehkonen+ might make sense, particularly since Jacob MacDonald has looked really good as an AHL callup and only needs another 13 GP to meet the expansion eligibility criteria to give Colorado a Dman to expose. If it happened it would have to wait until Avs get some Dmen healthy though, as half of their top 6 is injured right now (i.e. Johnson, Makar, Byram, Timmins).
Fwiw there's been mutual interest in the past, as Bergevin was in Denver with his assistant GM at last years deadline to scout Graves, and Avs have liked Lehkonen for a while.
With their lack of bottom 6 production I'm not sure Lehkonen is what the Avs need right now though, especially given how important Graves is to the PK. Could see it being an offseason move if Lehkonen isn't asking for too much on his next contract.