### 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)

#include "color_picker.h"
#include "core/input/input.h"
#include "core/io/image.h"
#include "core/math/color.h"
#include "core/os/keyboard.h"
#include "core/os/os.h"
#include "scene/gui/color_mode.h"
#include "scene/resources/image_texture.h"
#include "scene/resources/style_box_flat.h"
#include "scene/resources/style_box_texture.h"
#include "scene/theme/theme_db.h"
#include "servers/display_server.h"
#include "thirdparty/misc/ok_color.h"
#include "thirdparty/misc/ok_color_shader.h"
List<Color> ColorPicker::preset_cache;
List<Color> ColorPicker::recent_preset_cache;
void ColorPicker::_notification(int p_what) {