### 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)

BIND_ENUM_CONSTANT(MODE_OKHSL);
	BIND_ENUM_CONSTANT(SHAPE_HSV_RECTANGLE);
	BIND_ENUM_CONSTANT(SHAPE_HSV_WHEEL);
	BIND_ENUM_CONSTANT(SHAPE_VHS_CIRCLE);
	BIND_ENUM_CONSTANT(SHAPE_OKHSL_CIRCLE);
	BIND_ENUM_CONSTANT(SHAPE_NONE);
	BIND_THEME_ITEM_CUSTOM(Theme::DATA_TYPE_CONSTANT, ColorPicker, content_margin, "margin");
	BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, ColorPicker, label_width);
	BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, ColorPicker, sv_width);
	BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, ColorPicker, sv_height);
	BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, ColorPicker, h_width);
	BIND_THEME_ITEM(Theme::DATA_TYPE_CONSTANT, ColorPicker, center_slider_grabbers);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, screen_picker);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, expanded_arrow);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, folded_arrow);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, add_preset);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, shape_rect);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, shape_rect_wheel);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, shape_circle);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, bar_arrow);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, sample_bg);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, overbright_indicator);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, picker_cursor);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, color_hue);
	BIND_THEME_ITEM(Theme::DATA_TYPE_ICON, ColorPicker, color_okhsl_hue);
	BIND_THEME_ITEM_EXT(Theme::DATA_TYPE_STYLEBOX, ColorPicker, mode_button_normal, "tab_unselected", "TabContainer");
	BIND_THEME_ITEM_EXT(Theme::DATA_TYPE_STYLEBOX, ColorPicker, mode_button_pressed, "tab_selected", "TabContainer");
	BIND_THEME_ITEM_EXT(Theme::DATA_TYPE_STYLEBOX, ColorPicker, mode_button_hover, "tab_selected", "TabContainer");
}
ColorPicker::ColorPicker() {