Colour was a late introduction into tattooing, after centuries pigment was added to create colour within the tattoos. Colour was commonly found within Japanese cultures and American Traditional as you look at the old styles you can see the limited pallet they had to deal with. As decades went by more colours/pigments were introduced allowing for a more varied approach to tattooing. Colour allowed the artists the experiment with colour, which adapted into new styles such like New Skool, Trash Polka and Realism. I have a handful of colour artists that inspire me, David Corden being the main one, realism is difficult to do within tattooing alone, especially to do it well, but he manages to apply colour to his work and still pull off the realism.