Attack Types

Green Attack
Green attacks are projectiles that cannot harm you. Moving your soul into them is necessary to spare majority of the fights where they appear. This type of attack is introduced by Vegetoid, and is also used by Woshua, Tsunderplane, Parsnik, Whimsalot, the Royal Guards, and Flowey.

Blue Attack
A  Blue Attack  is a game mechanic in which certain projectiles will not harm the player so long as they are not moving. It is the opposite of an  Orange Attack. The mechanic is introduced by  Doggo  and is used later on by  Lesser Dog ,  Greater Dog ,  Dogamy and Dogaressa ,  Gyftrot ,  Papyrus ,  Asgore ,  So Sorry, Mettaton ,  Sans  and the colored laser beams found in  Hotland  and the  Core.

Orange Attack
An Orange Attack is a game mechanic in which certain projectiles will not harm the player so long as they are in motion. It is the opposite of a Blue Attack. The mechanic first appears with the colored laser beams found in Hotland and the Core. It is also used in the fights against Pyrope, So Sorry and Asgore.