Writing your name in red ink means death in South Korea
If you find yourself in the bustling cities or in the calm countrysides of South Korea, avoid using red ink. Historically in Korean culture red ink was only used to note the names of the dead on the family register.
If the name of a living person was written in red ink, it was considered a sign that the person who wrote the name wished harm upon the other.
Now, using red ink is a huge ‘no’ throughout the country, especially to write down a name. It’s considered rude and a sign of ill-will against the person whose name is noted, so it’s best to simply avoid the color altogether.