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kotlinlang

Hi,
I want to design a dark theme and checked the material design guidelines about that. Usually you take #121212 as baseline color for the surface and put an overlay of color white with an opacity of 8 (or 9% depending on elevation level) % on it. Can someone please explain me how I can figure out the true color (combination of both) `In this case, it is #272727 which is a mix of #121212 and #FFFFFF (9%).` I also read this tutorial which helps a lot but he didn't explain how to calculate the colors.
<https://blog.prototypr.io/how-to-design-a-dark-theme-for-your-android-app-3daeb264637>