I want to know whether this is a violation of the Fair Trade Act.

First, if a large company imitates and sells your product by only changing the color, this may be considered an unfair trade practice.

However, whether it constitutes an unfair trade practice under the Fair Trade Act requires consideration of several factors and legal issues must be examined together.

In your case, through consultation with a specialist attorney, if the other party's actions are judged as unfair trade practices, you can report them to the Fair Trade Commission and subsequently pursue civil and criminal liability.

If unfair trade practices are recognized and the violation of the Fair Trade Act is also recognized, imprisonment of up to 2 years or a fine of up to 150 million won may be imposed.

Also, among Fair Trade Act violations, if it falls under unfair trade practices, the punishment level is higher with imprisonment of up to 3 years or a fine of up to 200 million won, so caution is required.

However, to properly prove the violation of the Fair Trade Act, appropriate evidence collection and corresponding defense are necessary, so it is good to seek help from a specialist attorney.