Not bad at all for your first coloring Nishan, good job. The only things you probably should of done, was color in the Chidori, and maybe used a darker color for Sasuke's pants. Maybe Deidara's tongue would look better if it were slightly darker, and his ring would probably look better if it were a different color. As far as mistakes go, there are only 2 things I see, and that is the background color missing by Deidara's right foot, and some of the flesh color is on the bottom of the inside of his ninja boots. Other than those couple things, this is a really good coloring for your first one, so keep it up. I think if you stick with it, you have the potential to get really good at this, so keep that in mind.