'striking colours' is a correct and usable phrase in written English.
You can use 'striking colours' to describe something vivid, bold, and visually striking. For example, "The sunset was a dazzling array of striking colours."
They have small flowers, sometimes chartreuse and inconspicuous, but more commonly of more striking colours.
Some of the most striking colours appear in males during mating.
With striking colours, it is an impressive bit of wrist wear.
Corals get their striking colours thanks to the zooxanthellae algae that they live with.
Thus, it fails to offer an explanation for the striking colours of many complexes, which arise from their selective absorption of light of only certain wavelengths.
She introduces striking colours and radical designs into the sewing circle and when a grieving widow, D, joins them, she assumes complete control.
Others suddenly present striking colour patterns previously hidden.
The striking colour, emphatic brushwork, and contoured forms of his work powerfully influenced the current of Expressionism in modern art.
Abroad: the bougainvillea (although only this year did I realise that their striking colour came from the leaves and not the flowers).
The striking colour trickled out of broken windows, over the dirty sills and down the sides of some of the city's most precious – and most neglected – heritage high rises.
The leaves are clearly adapted to function like flowers in attracting insects: they are flowerlike in their striking colour patterns and shapes, and, during their active period in the summer, they exude nectar containing fructose, which is highly attractive to some insects.
