Hair dye's, My old age is creeping up on me.

Well then the time has come to get rid of the grey that's started to appear lol. I suppose it's not to bad i'm 47 and not had to dye my hair until now so hopefully it will be ok. I'm naturally blonde so now i'm wondering should I go for it and doing something shocking and add a fab colour and frighten the neighbour's lol or just go as close as I can to my natural colour now that is the question any help would be very grateful please. What makes give the best result's I wonder makebe have to try a few till i'm happy with how it turns out. I am daring and really would love to try something with a bright colour or colours.