Get parsed color after init (MaterialComponent)

[KikoCosmetics]

I can't find a reliable way to get the computed hex value from the MaterialComponent.
In my use case I set the color programmatically by getting the background of a dom element.
Usually that element has a background in the format rgb(250, 250, 250).
What I need is get the hex value.
But the onChange and onChangeComplete events never fire when I change programmatically.
Am I doing something wrong?

I could read the hex property from the component instance, but as I said it's not reliable because I don't know when the value is ready. And frankly it's a bit awful.