what do the colored key cards open in tarkov
In Escape from Tarkov, the colored key cards are mainly for opening Lab rooms, and most of them are reusable rather than one-time-use cards.
What each card opens
| Card | Opens |
|---|---|
| Red | Arsenal room / Security Arsenal area. | [4][1]
| Violet | Security post / security room near the arsenal area. | [1][4]
| Blue | Quarantine zone / medical-lab access. | [7][1]
| Green | Lab block 2 / second-floor lab area. | [7][1]
| Black | Lab experiments room. | [4][1]
| Yellow | Typically used for a room tied to alarm control / access utility rather than a high-loot room. | [4]
Quick scoop
The short version is: red, violet, blue, green, and black are the main colored Lab key cards people care about for room access, while yellow is usually viewed as much less valuable.
Extra note
Older guides and player discussions sometimes describe the card/room names a little differently because Tarkov changes keys and access requirements over time, but the core idea stays the same: colored key cards are Lab access cards for specific locked rooms.
