Amber blocks are transparent, amber cubes about as tall as Sonic, with soft corners.
In gameplay, amber blocks can either float in midair or sit on the ground. They are also solid enough to be stood on. When an amber block is attacked, either by the playable characters with the aid of directly offensive abilities and/or moves such as the Slide, Color Powers or a Wispon, or enemies, such as Egg Pawns firing offensive shots, or are just hit by a devastating impact, such as a playable character flying into them after being launched from a Spring, it will shatter and disappear. After about a second however, a new amber block will respawn in the same place. If the playable character is standing in the place where the amber block would respawn however, it will not appear until they step away.
In the Wii version of Sonic Colors, and the remaster Sonic Colors: Ultimate, amber blocks appear as the main gimmick in Sweet Mountain Act 6 and Planet Wisp Act 5. These Acts also feature several Egg Pawns wielding Egg Guns that can break the amber blocks when they shoot them. Should Sonic get caught inside the amber blocks while these shots are fired, it will leave him with limited space to dodge the shots with.
In Sonic Forces, the amber blocks are the main gimmicks of the sixth secret stage, Reverse Block 1, where the player controls the Avatar, and the fourth extra stage, Reverse Block 2, where the player controls Sonic/Shadow. In these stages, the player has to make it to the goal while either using amber blocks or getting past the blockades of amber blocks.