Temporary background
I made a “Color” folder underneath the “Line art” folder. In “Color”, I made a “Background color” layer and painted it one color using [Fill]. The color may change afterward.
 Changing the line art’s color
Next, I changed the color of the line art.
1. I created a new layer above the “Line art” folder.
2. I selected the new layer and clicked [Layer] menu →[Layer Settings] →[Clip at Layer Below].
3. The new layer was renamed “Line color”. Filling “Line Color” with the [Fill] tool will change the line art’s color.
For this piece, I gave it a purple hue. As 100% black makes images look too harsh, I usually shift the color from black to a lighter color.
 Base coloring
I added base colors. Separate layers for each color were made above the “Background color” layer. I often put the skin layer at the top.
As the “Line art” folder is already set as a reference layer, I selected and painted skin with [Selection for referred layers] under [Auto select].
I painted details that I could not select using the [Darker pencil]. I repeated this process.
As I made the wedding outfit a main motif, I limited my color palette to white, red, and blue. I also changed the background color.
When choosing colors, I think it’s easier if you limit yourself to the colors you really want to use (white and red in my example) plus two or three hues of those colors.
The base coloring is complete.
The layers currently look like this.