I mean like how do they color the inside of it so it's colored & stuff?

I'm getting my very first tattoo this day and I'm curious as of how they do that.

Answer:
They do it the same way they do the outline, the whole tattoo is done by needles. You should speak to your artist more before you get it done so you comprehend how it all works. There are different needles used for coloring and shading. Remember when it hurts to be still and just breath thru it if it gets intense, but you should love the end result!
Answer:
The tip of the tattoo gun actually has a bunch of tiny needles that go up and down as the artist works. Depending on what you're doing and the color the tip has more or less needles…
Answer:
The use different color inks for outlines and interiors. It's a tiny like kids coloring on a blank sheet of paper.
Answer:
they dip the needle in the coloured ink and they color the tattoo. it's done the same way they add the black ink only with different coloured ink
Answer:
They just use colored ink. First he’ll outline it, then use a different needle to use ink to color the inside.
Answer:
Its colored ink my friend, and they use different needles for different things like fine lines, shading and fill ins
Answer:
duh…colored ink! You might considering getting a tiny more education on tattoos and their care before you invest in one!
Answer:
this might help you

http://www.howstuffworks.com/tattoo.htm

Good luck with your tattoo.

and go to a professional.

Answer:
colored Ink silly
Answer:
they use between 3-5 needles, similar to the way the do the outline.

Answer:
they’ve a single line needle and shade it in with a 3 needle pin. worst parts the line after that everythings numb
Answer:
color ink… im gettin my first one at the end of the month
Answer:
with a needle thy just use color ink l0l my sis jus qot one last nite she said she screamed good luck !