Since the update I am unable to read my text messages. The text bubble is white and the text color also white and I see no way to change the color scheme. I changes the theme for the phone and wallpaper and nothing works. I have to have people contact me through Facebook messenger which is inconvenient. Before the update there was an option for the wallpaper in the settings of the samsung messages app, this option is gone and there are no other options to change colors.
@IflySolO - I don't use any Samsung Themes - But check the theme's description & also the date of the last update to the theme... if it's long before Samsung released One UI than it's unlikely to support it 🙂🐧