For the method used in this tutorial it is best to have: A good tablet with working pressure sensitivity, A fair amount of patience, airbrush type brushes, and if you don't get it right, like right away don't be hard on yourself! Everything takes practice.
Depending on the hair color, you can use white or something relatively close to white to make the highlights pop even more, by applying it on top of the highlight color. Though since Luna's hair is black, that method would probably over do the look. In general with black hair, that method would probably over do it in my opinion. Anyways!
Onto the yellow part of the dress and the yellow ribbon.
The shading color. Which is kinda burnt orange looking color isn't it? Well once that color is blended it'll look nice trust me on that.
Now the next part is the.. black lace puff balls on her dress that are located on top of her breasts, that I like to call... The boob flowers. They are actually just black lace puff balls for decoration but I drew them like they were carnations because it made sense to so I call them boob flowers. Next thing to do is is the set the boob flower layer to "Multiply" like shown. This will show the colors underneath the grey.
Now once finished with that, create a layer above the lineart layer and name it sparklys or sparkles, whichever you want. We are gonna add some pretty glitz to Luna's dress. C:
The brushes that I'll be using for the sparkles is the hard round brush on figure A, and the on on figure B. These brushes are standard to photoshop, they come with it. Everyone should have these brushes. If not then I am not sure if I can help you there.
Now moving on the the larger part of the dress. The black sheer sparkly part of her dress. I think this was more time consuming than her hair was for me. Oh well though it kept me occupied. Since there are two layers of the the black sheerness of her dress I felt that it was best to keep the top layer and the bottom layer of the sheer black dress part on separate photoshop layers. It should be easy to work with the sheerness this way I think. Keep in mind that with sheer fabric, when you fold it or crease it or layer it with another layer of the same fabric the color will look darker. The way I the black sheer fabric on her dress is that it has a lot of creases for fancy-ness and lots of folds, like how I drew it. I'll provide the reference I used at the bottom of this tutorial. Now...
I found it easier to alternate between smaller brushes and larger brushes when working with this. Don't try to blend the fabric, unless you plan on having a the fabric be solidly blended into the color of the background you chose, which that doesn't always look good. I rely heavily on the pressure sensitivity on my tablet for this kind of detail work. ( I hope I explained that right.)
Once you have the very bottom portion finished work on the next part of the bottom layer like shown. Now because I didn't feel like playing it dangerously I created another layer and used the same stroking method I used just a bit ago, but making it a bit dark since it's floating over another piece of the sheer fabric. I went ahead and airbrushed through it like shown so the edge would appear darker when I go to brush in the rest of the sheer black dress layer
Next is to add sparkles to the dress to match the boob flowers. After merging the those two layers that you did the stroking black method on the dress, now create another new layer. This layer, starting from the very bottom part of the sheer black portion of the dress, add in the sparkles using the same brushes that you used for the sparkles on the boob flowers. Add the sparkles and then using the airbrush eraser, gently erase some of the sparkles. Not completely! Just enough to make some be there to create some softness to certain portions of the dress. That probably didn't make sense much but oh well, it's 3 am. :D!
Celestial-star.net On a new layer above the sparkle layer I added one brush at a time to distort, reshape, and resize the brushes to how I see fit. You may have to use a star brush pattern on each of it's own layer just to safely and successfully move the stars around to how you see fit.
Next is to add details in her eyes. :3
References used: Minitokyo.net
I really hope that this was helpful in some ways. If not I am sorry. Very sorry. My next coloring tutorial will be a Paint Tool Sai tutorial! ;3 Shall be coming soon.