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Is there  a way to use `MaterialTheme.colors.primarySurface`
in an Activity …when i try to use it
example:
```systemUiController.setNavigationBarColor(color = MaterialTheme.colors.primarySurface)```
i get the error *@Composable invocations can only happen from the context of a @Composable function*

You have to make this call inside a Compose context, what you're trying to do is similar to trying to call a `suspend` function from a non-suspend one. Pass the `systemUiController`  down to your composable and then use a `SideEffect` : <https://developer.android.com/jetpack/compose/side-effects#sideeffect-publish>

There's a system UI controller accompanist library to set navigation bar color from compose code.

<https://google.github.io/accompanist/systemuicontroller/|https://google.github.io/accompanist/systemuicontroller/>

Also, what i've done here is to create another wrapper function for my theme which, in addition to setting up the theme colors, typography, etc... also sets the system bar color using the above mentioned library.