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 ① the Layer window, and select ② the line drawing layer.
From ① the Tool Selection window, select ② Filter.
Select ① Change Drawing Color.
Open ①Color Picker . Drag the ②Slider to adjust the color.
When finished adjusting, return to the canvas with ①✓ button .
Finished.