I finally got my hair blue and purple. Actually, I had it done almost a month ago but only now got around to getting some pics of it.
Initially, I did half my hair SFX Electric Blue and half MP Purple Haze. The Electric Blue showed up amazing at the freshly bleached roots and a weird greyish at the rest. The Purple Haze looked BROWN with only some bits of purple. Weird since it was on faded fuchsia (posting a pic of that too). So since I hated it and washing it didn't improve it, after a week I went over it with SFX Deep Purple. It came out a nice dark black/purple and is currently fading to brighter purple. I'm quite happy with it. Makes for a nice winter hair colour .

Also dyed purple the parts where the blue didn't come out well, so now I got about 10cm of blue roots and the rest purple.
For some reason my sister's camera wouldn't pick up the colour, she had to over-expose it to show up as it did, else it looked black, but I think it still looks better in real life.