Purple Dye that fades to gray/ silver

Hello everyone

I have bleached streaks in my dark brown hair and started dyeing them purple last year. The first dye I used was BRITE. It worked great, lasted long enough for me to get bored, and then faded to a very dreamy lavender/silver color--which was actually the main reason I wanted to try purple in the first place. Recently I tried Manic Panic Ultra Violet, but it’s fading way too quickly (maybe I did something wrong, or it's the sun?) and the faded color looks pretty dull. BRITE was gifted to me by a friend from Australia and is quite hard to get here in Germany, so I'm looking for a good alternative.

I have curly hair and shampoo maybe every ten days.

Could anyone recommend some semi-permanent hair dyes that are easily available in Germany/Europe? Shipping fees higher than the cost of the dye itself are very painful. (like with IroIro and BRITE)

Thank you!