Better Red Than Dread: Juan Chang-juei suggests that in primitive times, when man would see a bright red flower in a green field, he would find it quite eye-catching and delightful, so maybe this is why red is an "auspicious" color.
阮昌銳指出，原始時代人類在一片綠色的原野中，看到一丁點紅花，分外覺得醒目、喜悅，可能因此把紅色當成「吉利、吉祥」的象徵。