A lack of oxygen in the room can cause a color change. The gas contains butane, which, in the presence of sufficient oxygen, burns completely, producing carbon dioxide and water. In this case, a blue flame is visible on the stove. However, with a lack of oxygen, butane burns incompletely, producing a toxic gas called carbon monoxide. In this case, a yellow-orange flame is visible.
Therefore, always open doors and windows in the room where you are cooking to allow oxygen to enter.
PAY ATTENTION TO THE COLOR OF THE STOVE FLAME