Primary Prediction

Everyone in Mount Willer is born with a triangle behind their ears. The border of the triangle appears in random colors during birth, the colors are always primary; red, blue or yellow. The color of your soulmates triangle has to be different than yours or else the government will kill you both off. The government has also stated that no one may know their outer color of their triangle, and you can not know anyone else's color, with the exception of knowing your own Childs. However you must not tell them. When an engagement happens, and both partners have different colored borders, both triangles will fill with combination of the two colors, keeping the original border. however if the colors are the same then sharp pains will shoot through your body, sent by the triangle itself. In Mount Willer it's very common to see blue-red couples and even blue-yellow, but there is only one red-yellow couple that has been documented in the past 416 years.