If the velvet revolution means a United States-backed, made-up revolution, rather than an authentic one, if it means a foreign-made uprising, what's happening in Iran is not a velvet revolution. It's an authentic social civil rights movement.
But if velvet revolution means a peaceful evolutionary process that hates violence and wants to empower the good side of the constitution, then this term may be appropriate. What's happening in Iran is not coloured, but it's green. It's not a velvet revolution, but it's a peaceful civil rights movement. It's an authentic movement.