### 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 (!spinning) {
					real_t x = CLAMP(bev->get_position().x - corner_x, 0, real_size.x);
					real_t y = CLAMP(bev->get_position().y - corner_y, 0, real_size.y);
					s = x / real_size.x;
					v = 1.0 - y / real_size.y;
				}
			}
			changing_color = true;
			_copy_hsv_to_color();
			last_color = color;
			set_pick_color(color);
			if (!deferred_mode_enabled) {
				emit_signal(SNAME("color_changed"), color);
			}
		} else if (!bev->is_pressed() && bev->get_button_index() == MouseButton::LEFT) {
			if (deferred_mode_enabled) {
				emit_signal(SNAME("color_changed"), color);
			}
			add_recent_preset(color);
			changing_color = false;
			spinning = false;
		} else {
			changing_color = false;
			spinning = false;
		}
	}
	Ref<InputEventMouseMotion> mev = p_event;
	if (mev.is_valid()) {
		if (!changing_color) {
			return;