Addison - Unlike the FlipCalendar that you are helping to test, SVGClock does not have the capability to adjust the opacity.. In otherwords, the opacity of the clock is based on the transparency level of the SVG theme that is being used..

For example, the HTC theme clock face (SVG file) that you are using is completely opaque. However you would find that the black transparent clock face from here would allow for a high level of transparency, which is due to the SVG file being created with that level of opacity

hope this answers your query..