После смены спрайта цвет перестаёт влиять

public class PlayerHUD : GUI
{
    [SerializeField]
    private RectTransform health = null, maxHealth = null;
    [SerializeField]
    private RectTransform mana = null, maxMana = null;
    [SerializeField]
    private Text bottomText = null;
    [SerializeField]
    private List<Image> abilities = new List<Image>();
    [SerializeField]
    private List<Image> items = new List<Image>();
    private Color color_choosen = new Color32(255, 255, 255, 255);
    private Color color_notChoosen = new Color32(150, 150, 150, 255);
    public void setHealth(float percent)
    {
        health.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, maxHealth.sizeDelta.x * percent);
    }
    public void setMana(float percent)
    {
        mana.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, maxMana.sizeDelta.x * percent);
    }
    public void showBottomText(string text)
    {
        if (bottomText.text != text)
            bottomText.text = text;
    }
    public void hideBottomText()
    {
        bottomText.text = "";
    }
    public void setAbility(Ability ability, int slot)
    {
        abilities[slot].sprite = ability.icon;
    }
    public void chooseAbility(int index)
    {
        Debug.Log("choose");
        abilities[index].color = color_choosen;
    }
    public void chooseItem(int index)
    {
        items[index].color = color_choosen;
    }
    public void unchooseAbility(int index)
    {
        Debug.Log("unchoose");
        abilities[index].color = color_notChoosen;
    }
    public void unchooseItem(int index)
    {
        items[index].color = color_notChoosen;
    }
}