thats because the Wiki doesnt have full confirmation
look at the Key again is says PAL or SECAM and orange is SECAM confirmed
UK defo is PAL and so is Australia with parts of China also PAL
Pakistan and india don't have a standard actually but its common to use PAL, every TV there is actually multi adn will handle PAL/NTSC/SECAM/CableTV/UHF/VHF/FM which is a little over kill but they are mostly manufactured in china so its cheap anyway
the rest of the blue areas the wiki has made a calculated guess from other wiki info they find
dont forget the wiki is user based so mistakes are common and you need to take it with a pinch of salt