Is it just me or

Column(modifier = Modifier.fillMaxSize())

is overriding background set in

Colors(..., background = Color.Red, ...)

for the Material Theme. Not sure if it is strictly

Column

releated but if I remove it from the view hierarchy I am able to see

Color.Red

as the background.

Column

that I am removing has no background of its own. I fail to pinpoint if there is some material color that is taken by default for

Column

background. I have checked the source code and couldn't find any defaults taken f.e. from

colorPrimary

or else. Now I see it as a bug but maybe I got something wrong..

What is the content of your

Column

?

There is some content, but I am testing without any content.

What does your full tree of Composables look like? I.e. what is this

Column

in?

A lot of other stuff there but they do not cover the background in my opinion because as soon as I remove the Column I can see the background so it seems that items up the tree do not affect the background. Anyways, to sum up this is rather an odd behaviour and rather not happening in general but related to my setup and I should debug more?

I’m guessing it is related to your particular setup. You are correct that Column does not set a background of any sort by itself, and it has no references to Material. Column is part of the foundation library and is thus unaware of any sort of specific design system implementation such as Material. Things I’d be looking at would be whether I’m using a

Surface

or a

Scaffold

somewhere, and where that is. Those are the types of Composables (from

androidx.compose.material

) that tend to utilize properties like the background color