[Kaderin Triste]

The problem with most bright color dyes is that they can look really fake if you're unlucky and have dark hair (basically if you have to bleach your hair and do it properly to a pale blonde/nearly white base) unless you manage to mimic natural highlights and lowlights in the bleaching process, it's gonna look like a wig.
90% of the time I was too impatient to do multiple bleachings, so I'd bleach once then dye. Which on the downside, meant that I nevwr got to do cool pastel colors, but on the plus side, my dyed hair still had some highlights and lowlights in it.

My hair has been many colors, but typically hot pink, raspberry, purple, and teal are my main colors that I've done.
My favorite hair dye job was actually a pink/teal/purple gradient. Unfortunately, my job at the time was less thrilled with it and basically said I either had to dye it a "natural" color or I'd be fired, so I picked up a box of black dye. And it ended up turning a navy blue color. But that was "less extreme" and therefore was acceptable.
And then when that job was closing down and everyone was getting laid off, I decided to do a sort of peacock-esque purple, teal, and green dye gradient for my last week there. That was when I really noticed that green is not a good color for me and washes out FAST in my hair. Like it really was only good for maybe a week and a half.
I've also done a dark purple color that kind of had a color shift to it. In some light it looked purple and in other light it looked blue.

I should really try to dig up old pics of me with dyed hair (oh oh and that was when I still had snakebites too!).