* κόκκινος (kokkinos): This is probably the closest overall equivalent, referring generally to red or crimson. Scarlet would fall under this broader category.
* Words relating to specific dyes or sources of the color might also be used, depending on the source of the scarlet dye (e.g., kermes insects). These would be more specific than a general color term.
Therefore, a direct translation doesn't exist. The best choice would depend on the specific context in which "scarlet" is used.