The smoke from a standard smoke grenade in PUBG is white.
A smoke grenade creates a dense white cloud that blocks line of sight. Players use it to cross exposed ground, revive a teammate, conceal a vehicle, obscure an enemy’s view or create a temporary escape route. Because the smoke is visual cover rather than a solid barrier, opponents may still fire into it or use sound and movement clues to predict what is happening inside.
The white cloud is distinct from other colored effects in PUBG. Supply drops emit red smoke, which marks a valuable loot crate and often attracts nearby players. That red smoke belongs to the drop itself, not to the ordinary smoke grenade, making it a common source of confusion in trivia questions.
Special modes, cosmetics or newer features may introduce unusual visual effects, but the conventional smoke grenade used in standard PUBG gameplay produces white smoke. Its tactical value comes from obscuring vision for everyone nearby, not from dealing damage or restoring health.