bright flowers get pollinated because the insect attract them because of the color of the flower
The flowers that are not brightly colored either have smell to attract the insects for pollination during night or these are pollinated by wind.
A. Brightly colored flowers. In animal-pollinated plants, brightly colored flowers are common as they attract pollinators like bees, birds, and butterflies.
Wind-pollinated flowers tend to be less showy and colorful compared to insect-pollinated flowers which are often brightly colored and fragrant to attract insects. However, the structure of wind-pollinated flowers is specialized for efficient wind dispersal of pollen, which is important for their reproduction. So, while they may not be as visually attractive to us, they are still well-adapted for their method of pollination.
bees
to attract bugs to land on it. After landing on the flower pollen will stick to the bugs feet, so then when the bug lands on another flower, it will pollinate it. That is one way of how flowers reproduce sexually.
Some plants do not have flowers. Nearly all the plants you see around you are flowering plants: trees, bushes, vines, grasses and the "weeds". The flowers may not be big and showy, but they are there if you look for them. When flowering plants spread all over the world, about a hundred million years ago, they pushed aside the ferns and mosses and cone-bearing trees that had covered the planet for many millions of years. Of course, those plants are still here but they no longer have the planet to themselves as they did before the development of the super-successful flowering plants.
Wind-pollinated plants do not need colorful flowers as they are not pollinated by animals, insects or birds. Since wind-pollinated plants do not need colorful flowers, they might as well put their energy into making their pollen lighter, or more of it.
To attract pollinators.
rose
Many colors have brightly-colored flowers; the purpose of this is to attract insects, which assist the plant in pollination.
Many colors have brightly-colored flowers; the purpose of this is to attract insects, which assist the plant in pollination.
The pride o barbados is insect pollinated because it produces sweet nectar and is brightly coloured which attracts insects.