Making a joke or sarcastic comment to someone via text, online chat, or email is different now. When we’re together in the office setting, we can “read” other cues to determine when someone is being serious or not. Tone won’t always translate effectively without accompanying body language such as facial expressions. You can use smiley emojis or playful gifs where appropriate, but it’s safer to be wary of jokes or comments that rely on tone to work.