Unable to specify icon colour in Firefox

[NeptuneUK]

Hi,

I'm sending notifications to Firefox & Chromium web browsers (Ubuntu Linux 18.04 (64bit) + FF 81.0 & Chromium Version 85.0.4183.121)

Notifications are being received, I can change the standard icon, but I'm unable to change the icon colour, they always display as the default blue.

Is there anyway to alter this behaviour, that is to display the icon using the specified colour via the api OR use the default OS system font colour??

[admin]

Hello and thanks for using Pushsafer!

browser can only display / user the parameter titel, message, icon & URL!
All other also works, but only displayed in your dashboard!

Reagrds Kevin