If you're looking to add a little blue to your dark hair, there are a few dyes that can help you achieve the perfect shade. Here are a few of the best blue hair dyes to use on dark hair:
1. Manic Panic's Blue Moon Hair Dye: This dye is specifically designed for dark hair, and it will give your locks a beautiful blue hue. It's semi-permanent, so it will gradually fade over time.
2. L'Oreal Paris Feria Pastels in Smoky Blue: This is another great option for dark hair. It's a temporary dye, so it won't last as long as the Manic Panic dye, but it's still a great way to add some blue highlights to your look.
3. Garnier Nutrisse Ultra Color Nourishing Hair Color Creme in Deep Blue Black: If you want a more intense blue color, this is the dye for you. It's permanent, so it will last until your next color treatment.