Having pastel blue hair

So.....we lightened my hair. I've waited a year to change the colour, as it was feeling a bit sorry for itself, and this is perhaps an interim colour, as I'm not sure what I want to do with it!

It's not perfect yet, the roots need some more work this week (hence wearing bandanas!) and I'm not sure how I feel about it, but I'll wait before making any rash decisions!

I've had dark hair for so many years (despite being a natural blonde) that I'm finding it very strange seeing myself with pale hair.

Why is it so hard to have pastel hair?

You need to have almost white hair underneath and naturally dark hair may refuse to shift its natural orange-ness with bleach.

You hair may be too damaged or fragile already to withstand the lightening process. 

You may have lots of old stubborn staining on the bottom half of your hair, from years of old dyes, that just won't shift.