What looks better: plum and lavender eyeshadow or black and blue eyeshadow?

it depends on your skin tone. you have to be careful with both palettes of color. you can easily make your eyes look dead or like u hav a black eye. so i think if your skin is golden the plum and lavender, if its fair then black and blue and if it's deep then i think black and blue. but it's all up to you! i hope this helps :)