Hello! I unfortunately can't recommend any games but I can recommend this website that sorts games based on various accessibility features:
$1 Also, I am currently working with a group of other students trying to implement high-contrast in games, if your wife would like to test for us we would greatly appreciate it you can write to me on reddit or our group email
$1 . Testing will be done during this and next week and we would love a 15-20 minute audio interview afterwards to ask questions about the experience. Thank you.