Cool article, but the Spectrum really only had 7 colours and black. And at the time I hated the Commodore 64's colour palate (and any non ZX Spectrum palate, until I saw the beautiful SAM Coupé's) so I guess it's a matter of preference.
The spectrum was capable of all sorts of odd things that were never intended. http://tarjan.uw.hu/zx_gfx_modes_en.htm