Use this tag for when eyelashes have a mismatched color from the hair, or when two eyelashes have different colors (particularly in cases of Heterochromia, or weird instances like post #639207 or post #672047). There are rare instances of when the eyelashes don't match either the eyes or the hair, instead using a third color (post #254939).
Don't use this tag if the eyelashes don't fit the criteria of Colored Eyelashes.