added 2 extra passes in my action in these touhou scans to adjust colors which can't be adjusted with tonecurves.

1) desaturate darks (saturation-30 on the darkest)
2) replace yellowish red into true red (hue 8 => hue 0)

In each processes, I used color range selection + expand/contract + hue/saturation instead of using color replacement. because color replacement fails to catch noises. expanding selection solved this issue.