Two plants are crossed to produce offspring. One parent plant has dark blue flowers, and the other parent plant has white flowers. Flower color in these plants is a codominant trait.

Which of these is a possible description of the offspring?

some flowers with white petals and some with light blue petals
some flowers with dark blue petals and some with white petals
all flowers with light blue petals
all flowers with some dark blue petals and some white petals