If you have a single line of text that is 50,000 chars long, BC will have trouble applying its grammar and RegEx rules until you increase the line length of the display.
I am a lousy colorist but I like rich color. Plus I'm colorblind so I need something more bold than the default pinks in Beyond Compare. I found an Elaine de Kooning painting on DuckDuckGo images, pointed the Mac colorpicker at it, and used the colors as my settings. Those are the colors in most of my screenshots here. If you want my colors, or want to improve my colors, download this file and then in Beyond Compare choose:
Tools->ImportSettings. Then tweek them at
Git Diff two versions of a css stylesheet
folder sync scheduled backup
folder sync to a server with ssh keys
folder sync I've made a mess of my backups