This colours are really diffent from other colours just because its brightness shows beauty of art.Its red colour is such a all in all for drawing.This coloure provide breath in your colouring .And its sky blue colour is amazing if you try this colour for clowd drawing you see that its amazing results in your art.People say you and ask you which types of colour you use always in your coloring.i can say it because its my own experience in my drawing and I feel glad to say you. You should try it and see its amazing brightness .This colours is smoothly and easy to use .And no make pain in your coloring time .