Here's the breakdown:
* Light Brown: You'll have better luck achieving brighter, vibrant blues. You may need to lighten your hair a bit with bleach to get the truest blue, though.
* Medium Brown: You'll likely see a muted or toned-down version of the blue. You might need to use a lightener to achieve a more vibrant blue.
* Dark Brown: The blue will show up as more of a cool tone or a subtle tint. To get a bolder blue, bleaching is almost a necessity.
Here's a few additional things to consider:
* Dye quality: Higher-quality dyes often provide better results, especially when working with darker hair.
* Pre-lightening: If you want a vibrant blue, you'll likely need to bleach your hair to a lighter level. This will allow the blue dye to deposit more evenly and brightly.
* Previous hair treatments: Previous dyes, treatments, or hair damage can affect how the blue dye takes.
Here's a tip: Do a strand test before you commit to full-head dyeing. This will give you a good idea of how the blue will look on your brown hair.
Ultimately, the best way to know for sure is to experiment! Have fun with it and see what results you get. 😊