When my daughter saw my son's stripey vest she wanted one.
One exactly the same but with bigger arm holes (his fits her but the armholes are a little tight).
We talked about it for days and days... could she have different colours? - no, she wanted it *exactly* the same so they could be twins. (erm right, I'd get blamed for that in years to come, I just know it)
Eventually I managed to get her to choose some different colours and popped to Spotlight to get some more to mix in.
Here it is started. It's purple on the bottom (but a very blue purple) a jade colour (her choice not mine), lolly pink and I've just started the blue row there.
I can't say it will be a beautiful thing when it's finished, but I'm sure she's going to love it and wear it with everything. There's not much more I can ask for than that I guess.
(I just hope taste comes with age!)