The intended use of this font is for a few different web applications to mimic the appearance of a clock. The sample below is an example of how I'd like to use it.
In order to simulate the blinking colon, I would like to continually toggle the text between the following states:
Since seven-segment fonts are typically monospaced fonts, the space character is the same width of one of the digits. As you can see in the graphic above, the colon is much thinner than the digits, so I cannot just use a standard space (
Here is a live JSFiddle example. As a placeholder for testing, I've just used the thin space, but I'm not sure that's the best choice semantically since there are many whitespace characters available to select from. Which one should I use for this purpose?