You could try https://rethinkdns.com/ their Android app is great too

ControlD has a free tier, albeit with less functionality

Go to 'manage themes ’ scroll down to yours tap the ‘share’ icon next to it. This will not share it, it just copies to your clipboard.

Then to use it you copy all the text, go to ‘import theme’ and it will pull from the clipboard

You should be able to just copy paste the theme here. This is one of the stock ones.

{“archivedTint”:“#FFB4009F”,“authorFlairTextColor”:“#FFEE02C4”,“awardedCommentBackgroundColor”:“#FF000000”,“awardsBackgroundColor”:“#FFEEAB02”,“awardsTextColor”:“#FFFFFFFF”,“backgroundColor”:“#FF000000”,“bottomAppBarBackgroundColor”:“#FF000000”,“bottomAppBarIconColor”:“#FFFFFFFF”,“buttonTextColor”:“#FFFFFFFF”,“cardViewBackgroundColor”:“#FF000000”,“chipTextColor”:“#FFFFFFFF”,“circularProgressBarBackground”:“#FF000000”,“colorAccent”:“#FF02EE80”,“colorPrimary”:“#FF000000”,“colorPrimaryDark”:“#FF000000”,“colorPrimaryLightTheme”:“#FFEE0270”,“commentBackgroundColor”:“#FF000000”,“commentColor”:“#FFFFFFFF”,“commentIconAndInfoColor”:“#B3FFFFFF”,“commentVerticalBarColor1”:“#FF0336FF”,“commentVerticalBarColor2”:“#FFC300B3”,“commentVerticalBarColor3”:“#FF00B8DA”,“commentVerticalBarColor4”:“#FFEDCA00”,“commentVerticalBarColor5”:“#FFEE0219”,“commentVerticalBarColor6”:“#FF00B925”,“commentVerticalBarColor7”:“#FFEE4602”,“crosspostIconTint”:“#FFFF1868”,“currentUser”:“#FF00D5EA”,“dividerColor”:“#FF69666C”,“downvoted”:“#FF007DDE”,“fabIconColor”:“#FFFFFFFF”,“flairBackgroundColor”:“#FF00AA8C”,“flairTextColor”:“#FFFFFFFF”,“fullyCollapsedCommentBackgroundColor”:“#FF21C561”,“isAmoledTheme”:false,“isChangeStatusBarIconColorAfterToolbarCollapsedInImmersiveInterface”:false,“isDarkTheme”:false,“isLightNavBar”:false,“isLightStatusBar”:false,“isLightTheme”:false,“linkColor”:“#FFFF1868”,“lockedIconTint”:“#FFEE7302”,“mediaIndicatorBackgroundColor”:“#FFFFFFFF”,“mediaIndicatorIconColor”:“#FF000000”,“moderator”:“#FF00BA81”,“name”:“Red Amoled”,“navBarColor”:“#FF000000”,“noPreviewPostTypeBackgroundColor”:“#FF424242”,“noPreviewPostTypeIconTint”:“#FF808080”,“nsfwBackgroundColor”:“#FFFF1868”,“nsfwTextColor”:“#FFFFFFFF”,“postContentColor”:“#B3FFFFFF”,“postIconAndInfoColor”:“#B3FFFFFF”,“postTitleColor”:“#FFFFFFFF”,“postTypeBackgroundColor”:“#FF0336FF”,“postTypeTextColor”:“#FFFFFFFF”,“primaryIconColor”:“#FFFFFFFF”,“primaryTextColor”:“#FFFFFFFF”,“readPostCardViewBackgroundColor”:“#FF000000”,“readPostContentColor”:“#FF979797”,“readPostTitleColor”:“#FF979797”,“receivedMessageBackgroundColor”:“#FF4185F4”,“receivedMessageTextColor”:“#FFFFFFFF”,“secondaryTextColor”:“#B3FFFFFF”,“sendMessageIconColor”:“#FF4185F4”,“sentMessageBackgroundColor”:“#FF31BF7D”,“sentMessageTextColor”:“#FFFFFFFF”,“singleCommentThreadBackgroundColor”:“#FF123E77”,“spoilerBackgroundColor”:“#FFEE02EB”,“spoilerTextColor”:“#FFFFFFFF”,“stickiedPostIconTint”:“#FF0336FF”,“submitter”:“#FFEE8A02”,“subreddit”:“#FFFF1868”,“subscribed”:“#FFFF1868”,“tabLayoutWithCollapsedCollapsingToolbarTabBackground”:“#FF000000”,“tabLayoutWithCollapsedCollapsingToolbarTabIndicator”:“#FFFFFFFF”,“tabLayoutWithCollapsedCollapsingToolbarTextColor”:“#FFFFFFFF”,“tabLayoutWithExpandedCollapsingToolbarTabBackground”:“#FF000000”,“tabLayoutWithExpandedCollapsingToolbarTabIndicator”:“#FFFFFFFF”,“tabLayoutWithExpandedCollapsingToolbarTextColor”:“#FFFFFFFF”,“toolbarPrimaryTextAndIconColor”:“#FFFFFFFF”,“toolbarSecondaryTextColor”:“#FFFFFFFF”,“unreadMessageBackgroundColor”:“#FF123E77”,“unsubscribed”:“#FF0336FF”,“upvoteRatioIconTint”:“#FF0256EE”,“upvoted”:“#FFFF1868”,“username”:“#FF1E88E5”,“voteAndReplyUnavailableButtonColor”:“#FF3C3C3C”}

I just looked at this in Voyager, you are correct, it should be ‘report comment’.