Why different flowers have different colors?

Different flowers have different colors because the ultraviolet rays they absorb are responsible for what color they are. If you take away these rays, the flower will not be able to develop its darkest pigment, resulting in a less colorful flower.

So why did plants evolve to send these rays back out? Because when it is dark outside, flower colors can still stand out! After all, it’s much easier for pollinators like bees and butterflies to find flowers when day-blooming plants are in full bloom.

The different colours of flowers of mainly come from pigment called anthocyanins. Chlorophyll is the well known pigment which give green colour. Also there are so many pigment which give different colours to different thing's.

And similiar to people's plants also carry there genes which deceides there colour. There are some inscets or birds which are attracted to dark colour. There dark or dull colour depends on Genetic. The colours of flower make reproduction and survival possible.

By attracting insects birds to carry pollen for reproduction from one plant to another by repeating the process.