WPF

private Color GetNewColor(Color colorParameter)
    {
       Color newColor;
       Color newcolor = Color.FromArgb(0, 255, 10, 10);
       return newColor;
    }

public class BooleanNotConverter : IValueConverter
{
    object IValueConverter.Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        bool bReturn = false;
        int iValue;
        try
        {
            if (Int32.TryParse(value.ToString(), out iValue))
            {
                bReturn = iValue != 0;
            }
            else
            {
                Boolean.TryParse(value.ToString(), out bReturn);
            }
        }
        catch { bReturn = false; }
        return !bReturn;
    }

    object IValueConverter.ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        int iReturn = 0;

        bool bReturn = false;
        Boolean.TryParse(value.ToString(), out bReturn);
        if (!bReturn)
        { iReturn = -1; }

        return iReturn;
    }
}

IsEnabled="{Binding IsLocked,Converter={StaticResource BooleanNotConverter}}"

<!--Converter Resource-->
<ResourceDictionary>
    <converter:BooleanNotConverter x:Key="BooleanNotConverter"/>
</ResourceDictionary>

IsEnabled="{Binding Source={x:Static prop:Settings.Default}, Path=dbOpen, Converter={StaticResource booleanNotConverter}}"