I suppose if they have the colour and prescription you need in stock, you will get them right away. Unless you're lucky, I'd guess you'd have to wait.
Why do you want colour contacts? They really don't look like the real thing. I'm a brown eyed gal whose come to terms with my boring eye colour; I see bad colour contacts all the time and realize sometimes you gotta work with nature, not against it!
Not trying to put down your choice; I'm just interested in why people are interested in colour contacts. Maybe they make 'em better these days..