setBlueHearts

    public static final ResourceLocation BLUE_HEARTS = new ResourceLocation(XLifeHealth.MOD_ID, "textures/gui/blue_hearts.png");
    public static final ResourceLocation GREEN_HEARTS = new ResourceLocation(XLifeHealth.MOD_ID, "textures/gui/green_hearts.png");
    public static final ResourceLocation ORANGE_HEARTS = new ResourceLocation(XLifeHealth.MOD_ID, "textures/gui/orange_hearts.png");
    public static final ResourceLocation PINK_HEARTS = new ResourceLocation(XLifeHealth.MOD_ID, "textures/gui/pink_hearts.png");
    public static final ResourceLocation PURPLE_HEARTS = new ResourceLocation(XLifeHealth.MOD_ID, "textures/gui/purple_hearts.png");
    public static final ResourceLocation YELLOW_HEARTS = new ResourceLocation(XLifeHealth.MOD_ID, "textures/gui/yellow_hearts.png");
    public static final ResourceLocation CYAN_HEARTS = new ResourceLocation(XLifeHealth.MOD_ID, "textures/gui/cyan_hearts.png");
    public static final ResourceLocation MAGENTA_HEARTS = new ResourceLocation(XLifeHealth.MOD_ID, "textures/gui/magenta_hearts.png");
    public static final ResourceLocation BLACK_HEARTS = new ResourceLocation(XLifeHealth.MOD_ID, "textures/gui/black_hearts.png");
    private final int tex_width =  7, tex_height = 7;

    public void setBlueHearts(RenderGameOverlayEvent event) {
        if (event.getType() == RenderGameOverlayEvent.ElementType.HEALTH) {
            Minecraft mc = Minecraft.getInstance();
            mc.getTextureManager().bindTexture(BLUE_HEARTS);
            bind(BLUE_HEARTS);
        }
    }