The phrase "a richer colour" is correct and usable in written English.
It can be used when describing a color that is more vibrant, deep, or intense compared to another color.
Example: "The artist chose a richer colour for the sunset to evoke a sense of warmth and beauty."
Alternatives: "a deeper hue" or "a more vibrant shade".
These are sweet, with a rich colour and some acidity.
This gives the soup a rich colour and taste.
Glimmers of iridescence on top of a rich colour palette of black, red and emerald mimicked the ornate exoskeleton of an "insect that changes itself for protection".
Proteins similar to GFP have been found in corals that emit blue, yellow, and red fluorescence, offering a rich colour palette for exploring the functioning of cells.
For example, our ancestors would have known to eat berries that had a rich colour, because that meant they were sweet and ripe.
The best grade of skins must be large, of a rich colour, and should contain plenty of hairs with whitish ends that give a silvery sheen to the surface of the fur". Louis Choris (Russian artist), Voyage pittoresque autour du monde..
In complexion she was a clear brunette with a rich colour; she had full round cheeks, with mouth and nose small and well formed, bright hazel eyes and brown hair forming natural curls close round her face.
In complexion she was a clear brunette with a rich colour; she had full round cheeks, with mouth and nose small and well-formed, bright hazel eyes, and brown hair forming natural curls close round her face," he wrote in his memoir.
But wrist-mounted touchscreens face other challenges — from how to protect such a large screen from the bumps and scrapes of everyday life, to how to fit in a big enough battery to power a rich, colour touchscreen display without building a chunky, ugly mess of a watch again.
For a rich colour, use bright crepe papers with a lot of dye in them.
