### 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)

if (updating) {
		return;
	}
	color = modes[current_mode]->get_color();
	modes[current_mode]->_value_changed();
	if (current_mode == MODE_HSV || current_mode == MODE_OKHSL) {
		h = sliders[0]->get_value() / 360.0;
		s = sliders[1]->get_value() / 100.0;
		v = sliders[2]->get_value() / 100.0;
		last_color = color;
	}
	_set_pick_color(color, false);
	if (!deferred_mode_enabled || !currently_dragging) {
		emit_signal(SNAME("color_changed"), color);
	}
}
void ColorPicker::_slider_drag_ended() {
	currently_dragging = false;
	if (deferred_mode_enabled) {
		emit_signal(SNAME("color_changed"), color);
	}
}
void ColorPicker::add_mode(ColorMode *p_mode) {
	modes.push_back(p_mode);
}
void ColorPicker::create_slider(GridContainer *gc, int idx) {
	Label *lbl = memnew(Label());
	lbl->set_v_size_flags(SIZE_SHRINK_CENTER);
	gc->add_child(lbl);
	HSlider *slider = memnew(HSlider);