public HSL(HSLA hlsa)
{
_h = hlsa.H;
_s = hlsa.S;
_l = hlsa.L;
_a = hlsa.A;
}
public ColorEditorViewModel()
{
HSL = new HSLA();
RGB = new RGBA();
HSL.PropertyChanged += HSL_PropertyChanged;
HSL.A = 1;
}