Asus' Zenbook UX21 and UX31 ultrabooks may have launched last October, but if you've managed to hold off this long you'll be able to pick them up in two shiny new colors. Soon the 11-inch UX21 will be available in hot pink, while the 13.1-inch UX31 will have a gold color option. Other than the new look, the two ultrabooks are the same as before in terms of specs and presumably pricing as well. For now, the new colors have only been announced for the UK where they'll be available at select retailers — PC World and Currys for the UX31, and Littlewoods and Argos for the UX21. Both are expected to go on sale by the end of the month.