Good evening MichelleĀ and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
I would love to help you with this topic.
You might try the following CSS rule to accomplish that.
If that does not work, ideally, it would be better if I could see your Community Add Event form in action (live). Could you provide me with an URL to that form (in a private reply if you prefer) ?
#tribe-community-events input[type="text"], #tribe-community-events textarea {
background-color: lightgrey;
}
Let me know how that goes.
Best regards,
Geoff B.