The closer the color is to blue the harder is it to acquire. Some NPC's and almost all monsters. NPC's and almost all monsters. Your basic newbie helm. NPC's and almost all monsters.
Spidersilk helm is a silver helm that looks like the chainmail helm.
NPC's and Spiders. Slimes and most harder monsters. Silver helm with a red band of feathers along the top. Bandits and Litches. This hat looks like blond hair.