How to change the color of the answers clicked? Currently when a response is chosen it turns red.
Before user selects the response -
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After user selects the response -
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This is the default behavior of the theme you are using. You can select another theme from the Look & Feel tab in the survey builder in the upper left corner. Here is a link to the documentation for more detail:
https://qualtrics.com/support/survey-platform/survey-module/look-feel/applying-survey-themes/
You can also have a custom theme created if it is part of your license. Documentation here:
https://qualtrics.com/theme-design/
If you are interested in how to do this with custom css code you can post your questions to the Custom Code section in the Developer Corner here in the community.