@KCM
The steps that the user's are describing is as follows.
In the form select the data card on which you want to implement the functionality.
In the below image I wanted to implement the functionality on the drop down DROPPING I have selected the same.
Drop down selection
Once you select this on the right hand side, you will see the name dropdown you have selected with options properties, advanced.
advanced
On the advanced tab, if you scroll down a little you will see the design part for the drop down and in that look for option Color
color
Here you can specify the condition shared by @v-siky-msft and you will be able to see the options in different colors based on the condition.
If this information helps you, please hit the like button and mark the solution as resolved, so that it will help other users in future.