If you do not like the current background of your Outlook Calendar, you can always change the color to a different color.

This post shows how to change & customise the default font size & style in Edge (Chromium) browser to suit your browser viewing requirements.

Along with color codes, players can enter formatting codes to change the text style into bold, obfuscated, italic, and more. Here are the formatting codes compatible with Minecraft Bedrock Edition: ...