Umm, not quite. Kira wore the pins of a Starfleet Commander, which would be the exact "naval" match for the "ground" rank of lower Colonel, the one that the English-speaking world calls Lieutenant Colonel. This rank comes right after Major, so the natural assumption would be that Colonel Kira was promoted to the rank of Lieutenant Colonel specifically, rather than for some mysterious reason skipping a rank and ending up a "full" Colonel.
Of course, nobody in Star Trek actually says "Lieutenant Colonel" specifically. But nobody need to, as "Colonel" is the correct form of address for that rank, just like "Commander" is the correct form for Chakotay's rank of Lieutenant Commander. Kira's rank pin is distinct from that of another Colonel appearing in the show - which is perfectly natural if this Colonel Day is in fact a "full" one while Kira isn't one yet.
(But Starfleet doesn't have Colonels of any color in evidence. Earth's old Military no doubt still did in the 2150s, as they had army-style ranks overall. But the closest the UFP Starfleet ever comes is showing a guy with a Vice Admiral rank pin who apparently is named Cornell West...)
Timo Saloniemi