I can't remember all of the #ff9372 codes in my head!
They need a button where you can save it, like an outfit. And maybe if you want to change it, they could let you delete that hair and pick a new one?
But I'm just a colour-coded OCD'er...
That's just my opinion.

A save button's not likely to come along unless a lottery winner donates big moolah to us, but...here's an option that will help you to earn more gold :D You could make a thread to save you favourite hair colours in, in THIS forum. Several people have created threads for this purpose, either just for themselves or for others to share their favourite shades too. So it's a handy workaround until the time comes when we can have a save function

If I ever win the lottory, I'll donate monies to you guys *hugs*

It's a good idea, but I do agree that it's likely to be unaffordable.
Yes, I suppose that's what the Avatar Chat is for.