### Godot version

v4.3.dev.custom_build [d76c1d0e5]

### System information

Linux

### Issue description

When opening the color picker by clicking on a color property the color changes slightly.

### Steps to reproduce

* Click on a property with value `Color(.5, .5, .5) ` in the inspector
* Click away
* Open the color picker again
* See the color change to Color(0.502, 0.502, 0.502) in the "RAW" tab

### Minimal reproduction project

[ColorChangeBug.zip](https://github.com/godotengine/godot/files/13545089/ColorChangeBug.zip)

wheel_shader.unref();
	circle_shader.unref();
	circle_ok_color_shader.unref();
}
void ColorPicker::set_focus_on_line_edit() {
	c_text->call_deferred(SNAME("grab_focus"));
}
void ColorPicker::_update_controls() {
	int mode_sliders_count = modes[current_mode]->get_slider_count();
	for (int i = current_slider_count; i < mode_sliders_count; i++) {
		sliders[i]->show();
		labels[i]->show();
		values[i]->show();
	}
	for (int i = mode_sliders_count; i < current_slider_count; i++) {
		sliders[i]->hide();
		labels[i]->hide();
		values[i]->hide();
	}
	current_slider_count = mode_sliders_count;
	for (int i = 0; i < current_slider_count; i++) {
		labels[i]->set_text(modes[current_mode]->get_slider_label(i));
	}
	alpha_label->set_text("A");
	slider_theme_modified = modes[current_mode]->apply_theme();
	if (edit_alpha) {
		alpha_value->show();
		alpha_slider->show();
		alpha_label->show();
	} else {