Because it is basically blood. A woman's body will react oddly and release an egg. When it finds out there isn't any sperm, it exits her body with a few other unneeded substances, like blood. There is my explanation.
Vermilion is a bright red to red-orange color.
Neon emits a red to orange colour
yellow and red
Bright Red and orange and full black and every other colour
The lithium color of lithium in the flame test is red.
Strontium nitrate emits a bright red flame when it is burned.
blue and green
It burns a distinct bright orange/red color which is unique to hydrogen alone.
It appears to be a dark purple in color, with bright orange and red markings on it's face & tummy.
The color name Baroque specifically means a rich bright red on the orange side. Like a scarlet(orange red) or blood red. In the Baroque period (1500 to 1600 ac) paint pigment colors came from the earth and among the most popular was bright red chalks. Vinci, Michelangelo, and Raphael among other old master used this color a lot. This color is also used a lot with gold in Baroque jewelry (red fire corals) and decorative painting.
Bright orange/red with yellow and black markings.
The rarest color is bright apple green with flashes of the red, gold and orange fire.