Yeah I'm pretty sure morado is purple aswell, and I have never heard someone say 'Estoy OK', I live in Spain and have done for the past six years. Also 'Hasta luego', means see you later, 'Hasta mañana' is see you tomorrow.
'¿Cuanto te debo?' - How much do I owe you? (for example if you have a bill in a bar).
'¿Qué significa ...?' - What does .... mean?
'He hecho nada' - I've done nothing (useful with the police =) )
'¿Cuantos años tienes?' - How old are you?
'Ponmé una cervesa por favor' - Give me a beer please.