No, red is not a demon. It is a color that can be associated with many different things, such as passion, love, anger, danger, and excitement. In many cultures, red is considered a symbol of good luck, happiness, and prosperity.

The idea of red being associated with demons may stem from certain religious or cultural beliefs. For example, in some religions, demons are depicted as having red skin or fiery red eyes. This may be due to the association of the color red with fire and brimstone, which are often associated with hell and the devil in Christian mythology.
However, it is important to remember that these depictions are based on myth and symbolism, and do not reflect any inherent properties of the color red itself. Colors, including red, do not have any intrinsic moral or ethical properties, and are simply a part of the natural world.
Moreover, the idea of demons as purely evil beings is a cultural construct that varies across different religions and belief systems. In some cultures, demons are seen as malevolent entities that cause harm and suffering, while in others they are viewed as mischievous or neutral beings that can be both helpful and harmful.
In summary, the color red is not a demon, and it is important to recognize that associations between colors and other symbols are often based on cultural and religious beliefs that vary across different societies and historical contexts. While certain associations may be widely recognized, they are not inherently true or universal, and should not be used to make generalizations or assumptions about the nature of the color itself.