In previous versions of Metronic you included a Color Palette page within the Demos. This would be very helpful to be able to see the colors all in one place. In particular, a number of the colors for buttons both for normal and hover state are not WCAG Accessible because the contrast is too low. Having a demo page would make this easier to test our customizations.
We will implement this feature for Metronic 8 demos soon. We are working on it currently. Also, we will release a new version of the Layout builder with some cool features.