Charlotte Higgins on the Ofili retrospective at the Tate Britain: “I got a jolt when I walked into the final pair of rooms, filled with his most recent work. In the first, the paintings are entirely blue – deep, midnight shades of indigo, ultramarine and bilberry. In the second, the paintings are screaming with acid colours: strident purple next to citrus orange; a tintinnabulating turquoise; egg-yolk yellow. And there is no elephant dung. And no glitter.”