Once the color of the original drawing changes, the image will have a different overall impression. If you would like to change only a certain color from the drawing (without altering the color of the line drawing), use alpha lock.
Prepare a line drawing you would like to change the color of.
Open ①the Layer window, and select ②the line drawing layer.
From ①the Tool Selection window, select ②Filter.
Select ①Change Drawing Color.
Drag ①the sliders left and right to make adjustments. Tap ②✓.