### 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)

switch (p_what) {
		case NOTIFICATION_DRAW: {
			const Rect2 r = Rect2(theme_cache.normal_style->get_offset(), get_size() - theme_cache.normal_style->get_minimum_size());
			draw_texture_rect(theme_cache.background_icon, r, true);
			draw_rect(r, color);
			if (color.r > 1 || color.g > 1 || color.b > 1) {
				
				draw_texture(theme_cache.overbright_indicator, theme_cache.normal_style->get_offset());
			}
		} break;
		case NOTIFICATION_WM_CLOSE_REQUEST: {
			if (popup) {
				popup->hide();
			}
		} break;
		case NOTIFICATION_VISIBILITY_CHANGED: {
			if (popup && !is_visible_in_tree()) {
				popup->hide();
			}
		} break;
	}
}
void ColorPickerButton::set_pick_color(const Color &p_color) {