How to change button coor in communication page in sharepoint online

See this link may help you, https://support.microsoft.com/en-us/office/change-the-look-of-your-sharepoint-site-06bbadc3-6b04-4a60-9d14-894f6a170818 https://stackoverflow.com/questions/58630061/customise-the-theme-and-button-colors-of-sharepoint-communication-site