Colored dials in watches are taken for granted now, though, in fact, they are a relatively modern development —especially in blue. Because of that, In its December 2, 2020 auction, Bonhams Hong Kong will offer a series of blue-dial wristwatches, tracing the history of what is now the hottest style trend in horology. Colored dials have their origins in the 1970s, when chronographs and dive watches used bright orange and zesty yellow to accent details, allowing wearers —mostly pilots and divers— to read the time in a clearer and faster manner.