Open your Muffin theme folder, go to: css > custom-styles.css
Open this file and paste the following code
Change the hex color ( #FFF ) for the color you want. You can check this color hex picker on W3Schools to get the hex code for whatever color you want.
Welcome to the Q&A site for Question2Answer.
If you have a question about Q2A, please ask in English.
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May 7, 2020: Q2A 1.8.4 released!