How do dye black hair blue WITHOUT bleach?

I was wondering how I can get my hair blue without bleach, and I know it’s somewhat nessescary but can I get recommendations of what brands are good for dying really dark hair ? Ex; (Hi color l’oréal: It’s for dark hair and I tried the Black saffire but you could only see the blue in the sun and now it’s just... show more I was wondering how I can get my hair blue without bleach, and I know it’s somewhat nessescary but can I get recommendations of what brands are good for dying really dark hair ? Ex; (Hi color l’oréal: It’s for dark hair and I tried the Black saffire but you could only see the blue in the sun and now it’s just regular black)
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