How to replace Color32::PLACEHOLDER in WidgetText with a different color?

[FireFragment]

I'm creating a widget with text inside of it and I want the text to have a certain color (let's say red for example) by default, but I also want to allow users to override the text color, so I want accept the text in form of impl Into<WidgetText>:

pub fn red_button(ui: &mut egui::Ui, text: impl Into<WidgetText>) {
    // Somehow replace `Color32::PLACEHOLDER` with `Color32::RED`
    ui.button(text);
}

But in this case, it seems I can't override the color to be red by default (ie. replacing Color32::PLACEHOLDER with Color32::RED)

The following code overrides the text to be red, but users of my widget can't customize it to a different color:

pub fn red_button(ui: &mut egui::Ui, text: &str) {
    ui.button(RichText::new(text).color(Color32::RED));
}

Documentation at https://docs.rs/egui/latest/egui/widget_text/enum.WidgetText.html mentions this:

You can color the text however you want, or use Color32::PLACEHOLDER which will be replaced with a color chosen by the widget that paints the text.

But doesn't explain how to replace Color32::PLACEHOLDER when I'm the one writing a widget.

Is it possible to override Color32::PLACEHOLDER with a different color? If not, is it planned / should I open a feature request in issues?

Thanks for maintaining this awesome library! :)