How can I add an opacity option for text box background in an image block?

Store Design
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How would I go about adding an opacity option for the background color of the text box in a “image with text” block?

2

Hi @seriouslysilly
Thank you for your question.
Which theme that you want to edit style?
Please share your store URL, page URL and also password (if your store has one) so we can help you.