What is a flower with 7 colors?
A flower called Hidrangea or seven coloured flower. Try a black-eyed Susan; you’ll see they tend to have 21 petals.
Which flower is rainbow?
Rainbow roses are not the only coloured cut flowers other cut flowers such as chrysanthemums, carnations, hydrangeas and orchids can also be rainbow coloured in the same way. There are seven colours in the rainbow: red; orange; yellow; green; blue; indigo and violet. However, there is a whole range of colours that we cannot distinguish with the naked eye. A rainbow is not a pure spectrum.