Thanks, however the base classes I provided could still be relevant with a few modifications
To be more in line with what you're suggesting , possibly functions passed to it as the easing

Color start_color = SColorFace();
Color end_color = SColorHighlight();
Color current_color = animation.LerpColor(start_color, end_color);

	struct Style : ChStyle<Style> {
		Value look[4];
		Color monocolor[4], textcolor[4];
		Point pressoffset;
		int   focusmargin;
		int   overpaint;
		Font  font;
		Image ok, cancel, exit;
		bool  transparent;
		bool  focus_use_ok;
	};