July Flowers in Hot Colors

I have often wondered about the flowers that bloom in July.  Why are so many of them orange?  I am enjoying them more than usual since July is cool here this year.  I usually look out and wish for lots of blue flowers in July. Blue would make things seem cooler.  These yellow and orange flowers often make it seem like the yard is fiery hot.
brown eyed susan in our prairie field

butterfly weed in our native prairie field

daylillies -19 years ago we planted one tiny plant on the corner of the outhouse we also have them all along the road in front of the house

poppies - started in a garden but we never know where we will see them each year

lilies - the one area where the deer don't eat them