When -color: is set to "ON", a \special can assign colors to characters and lines.
Antialiasing is used instead of the gray scale when compressing, but faint colors occur on the outlines by the painting over by REPLACE (cf. -cmode:).
Since the characters are displayed after antialiasing each character, the position is offset by a maximum of one dot.
For a 1:1 display by the loupe, the appearance can be normal.