Android Jetpack compose how to test background color

I have a composable that set the background color and I would like to test that.

@Composable
fun MyComposableButton(
    enabledColor: Color,
    disableColor: Color,
    isEnabled: Boolean = true,
) {
    val buttonBackgroundColor = if (enabled) enabledColor else disableColor
    Button(
        ...
        enabled = enabled,
        colors = ButtonDefaults.textButtonColors(
            backgroundColor = buttonBackgroundColor
        )
    ) { ... }
}

I'm expecting to write a tests like: verifyEnabledBackgroundColor and verifyDisabledBakcgroundColor.

I can't find any assertion directly available on the compose testing, and when trying to create my own I find that the SemanticMatcther uses a SemanticNode, but the constructor is internal for the latest so that is no go.

I try to mock the Color but I couldn't and according to this answer high API level would be required, which is a no for my project.

How can I test setting the background color for a composable?

To correct cutiko accepted answer :

Validating color of composable based on colorspace.name does not work since the returned value is just a name of the color space. In other words test will pass regardless of the actual color.

Actual solution:

If the purpose of the test is to distinguish if the actual color of the composable is correct, for instance in a case where the color of a composable changes dynamically we need to use method .readPixels which provide "ARGB values packed into an Int. "

example usage:

val array = IntArray(20)
composeTestRule.onNodeWithTag(TestTags.CONTENT_TEXT_FIELD_TAG).captureToImage()
            .readPixels(array, startY = 500, startX = 200, width = 5, height = 4)
array.forEach { it shouldNotBe Colors().Red.convert(ColorSpaces.Srgb).hashCode() }
array.forEach { it shouldBe Colors().Pink.convert(ColorSpaces.Srgb).hashCode() }