Onclick button set a css selector

[kbn]

Great solution above @Oscar_Ortega - and you're right, there are several posts across the forums about how to use custom CSS in Retool.

For example, for folks who find this post who are looking to learn about your options for implementing custom CSS in Retool, check out this Tips & Tricks post by my teammate Isaac!

How to use Custom CSS in Retool Apps

There are 2 ways to add custom CSS to Retool apps. Globally for all Retool apps — you can add any CSS you'd like to the "Preloaded CSS" area of the org settings -> advanced page (admin only) Locally to 1 Retool app — click the three dots (top-right menu), then scripts and styles. CSS will affect all components in the app. Please note, we strongly recommend using Retool's built-in style and theme options whenever possible. Class names and DOM structure may change as new features are added that …