Dual Color Mirabilis and Orange Ones Too.

This is what I found one morning on the planter bed where I am growing the yellow mirabilis. A bicolor flower due to cross pollination of two different colors or is it something else. Even the red mirabilis flower is a new color too cos' I remember I didn't plant any of this color. So does this mean the pink and yellow cross to get this new reddish color? I was actually germinating the yellow and orange ones on this planter bed. A couple of days later I found the yellow flowers blooming. Will add in the pic later.