Emails can be styled using HTML. There are considerable incompatibilities between browsers and servers, making the process a little precarious. Here are some general guidelines for safer practice in creating custom email layouts.
External stylesheets are not supported. In a website, standard practice is to separate structure and styling, by means of an included
.css file from another part of the site (a good place is a folder called 'css' in the root of the domain). In an email, the information is embedded into a frame of another website - either a mailbox on the server, on in a webserver, such as Outlook, on a client's computer at home.
However, images can be called from a remote domain.
What does not work so easily are background images. Background colour may be added safely. However, it is best to avoid dark backgrounds, since if the styling is overridden by the mailserver, browser or client, the text may become illegible, since light font colours are used with dark backgrounds. Style so that a default white background still looks fine.
Use tables for multi-celled/column layout. Tables are more understandable by all the various systems attempting to interpret the email format, than the usual HTML column system, using div and float.
To remove the default dotted line around links, add
outline: none; to the link styles.
To have the colour of the background transition across the div element, add the folowing code to the div styling:
Specificity in CSS cascade stylesheets refers to the degree to which a style is specifically assigned to elements on an HTML page. This is done via selectors:Mozilla Developer CSS Selector Reference
span element is a means of styling a short section of a page in a special way that is limited to the content between the
span opening and closing tags.
This is normal (inherited) color, but this red text is styled red.
Span elements can also be styled by adding a class or id:
This is normal (inherited) font, but this large text is styled with large lettering in the css file.
CSS can set the text to any font-face from a file provided:
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