Registry Healer allows to customize color schemes for the tree view. User can change the background color, colors of plain text, invalid strings, registry parameters and correction strings.
To change color scheme click on the Advanced menu -> Show Advanced Settings Dialog and then open the Colors tab. See a screenshot.
At this Advanced Settingsdialog user can change any of the colors used in the tree view, save new color schemes and load existing. It is always possible to restore the default color scheme.