### 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 (color == p_color) {
		return;
	}
	color = p_color;
	if (picker) {
		picker->set_pick_color(p_color);
	}
	queue_redraw();
}
Color ColorPickerButton::get_pick_color() const {
	return color;
}
void ColorPickerButton::set_edit_alpha(bool p_show) {
	if (edit_alpha == p_show) {
		return;
	}
	edit_alpha = p_show;
	if (picker) {
		picker->set_edit_alpha(p_show);
	}
}
bool ColorPickerButton::is_editing_alpha() const {