@tania did you find a solution? passing the style in the constructor should do it, something like:

button(R.style.BlueButtonStyle) {
    textSize = sp(14)
    textResource = R.string.save_search
}

additionally, you can take advantage of using

applyRecursively{}

to apply styles, because officially the function

style()

is deprecated, and internally it also uses

applyRecursively

@Deprecated("Use applyRecursively(block) instead.", ReplaceWith("applyRecursively(style)"))
fun <T : View> T.style(style: (View) -> Unit): T = applyRecursively(style)