This is a clone of the same box by GSK. The documentation for this template is the same for User:GSK/box. Substitute box with sbox to use a slightly smaller version.
This template is used to visually draw attention inline in a message, to a warning about something, such as inappropriate editor behavior, a coding difficulty to watch out for, etc. It is not used in articles, only user space pages (prefixed with User:). This template does not, and will likely never, support images as the purpose of it is to be as minimal as possible. As a result, soft colors are suggested rather than using hard colors (for red, use #733 instead of #F00).
When using a darkened template, I recommend using #333 as a base for other darker color choices. When using as a lightened template, I recommend using #DDD as a base for other lighter color choices.
This template uses four parameters; the first three are required. The parameters control the following options of the template, in this order: Text, Background Color, Text Color, Border Color (optional).
((User:GSK/box|Text to display|#333|#DDD))
Will render the following:
((User:GSK/box|Text to display|#333|#DDD|#F00))
Will render the following:
((User:GSK/box|Dark|#333|#DDD))
((User:GSK/box|Dark Red|#733|#DDD))
((User:GSK/box|Dark Blue|#337|#DDD))
((User:GSK/box|Dark Green|#373|#DDD))
((User:GSK/box|Dark Purple|#737|#DDD))
((User:GSK/box|Light|#CCC|#222))
((User:GSK/box|Light Red|#FCC|#222))
((User:GSK/box|Light Blue|#CCF|#222))
((User:GSK/box|Light Green|#CFC|#222))
((User:GSK/box|Light Pink|#FCF|#222))