Google on Tuesday refreshed its logo to better suit mobile devices that are supplanting desktop computers when it comes to modern Internet lifestyles. Google's logo keeps its four-color scheme but shifts to a soft sans-serif font. The company is also replacing the well-known blue lower case "g" icon with an upper-case "G" combining blue, green, red and yellow. The 17-year-old Internet company is keen to follow users of its online products onto new generations of Internet-linked devices such as smartphones, tablets and watches.