I use a HP G4050 scanner which is reasonably priced and is a standard size flatbed scanner. It is designed to scan slides and negatives also by including a backlight in the lid. Just doing a normal scan of the slides results in images on the computer that are the same as the actual slides.
However by clicking on the edit option of each slide after the pre-scan is done (before the final scan) there are several options, including one used to restore faded colors. This removes the reddish orange tint in the slides and brings back basically the full colors in original intensity. It works on most slides. My pictures of sunsets do not do well, but it probably can’t determine real reddish orange from the reddish orange from aging of slides.
Other scanner software sometimes includes software that will allow color restoration also. Articles on the internet mention that Silverfast, which is included with some scanners, will also make corrections to the reddish orange tint using color correction and optimization.
Many of the slides I have scanned have still been in excellent shape although they are 30 to 60 years old.
Send your questions to Dwight Watt at firstname.lastname@example.org. He teaches at a technical college in northwest Georgia and does consulting work for businesses and individuals. His website is dwightwatt.com.