Yellow is on top in both pictures of this colour cube. Which colour is on the face opposite red?

With yellow on top in both, the four side colours red, blue, green and black go round yellow in one ring. Picture (i) has blue just after red, and picture (ii) has black just after green, going the same way round. The only ring that fits both is red, blue, green, black, so faces two apart are opposite: red–green and blue–black. Violet, never seen, is the bottom.