Shaun,
Greetings from Syncfusion.
We have analyzed your query and found that we do not have
direct support for applying opacity to the secondary progress bar color.
However, we suggest using an RGB color for the secondary progress bar.
Currently, we have created a sample in Typescript as we are
unaware of the platform you are using. If the provided sample does not meet
your requirements, please let us know the platform you are using.
Code-snippet:
|
let warningsProgress: ProgressBar = new ProgressBar({
secondaryProgressColor: 'rgba(0, 128,
255, 0.5)',
/// 0.5 represents the opacity of the color
});
warningsProgress.appendTo('#linearbuffer');
|
Screenshot:

Sample: https://stackblitz.com/edit/9anhmi-nvfrmm?file=index.ts
Regards,
Nishanthi