Casino game thumbnails must work like profile pictures to shine on small...

https://judahsbrilliantthoughts.rivetgarden.com/posts/can-i-use-color-alone-to-show-game-categories-in-a-casino-lobby

Casino game thumbnails must work like profile pictures to shine on small screens. Each thumbnail needs one strong focal point that grabs attention instantly. Use high contrast and bold colors to stand out in crowded lobbies