The laboratory tested a new colourant to ensure it would not fade in sunlight.

The manufacturer removed several artificial colourants from the product after customer complaints.

The artist praised the colourableness of the fabric, which allowed subtle shading across the garment.

The artist studied the subtle colourations in the butterfly's wings to better replicate their patterns.

The bird's bright colouration helped it attract a mate while warning predators of its toxicity.

The photograph looked more vivid in colour than in black and white.

The colourization of the old documentary brought new life to its black-and-white scenes.

Her favourite pastime is colouring intricate mandalas on rainy afternoons.

The colouring agent used in the recipe gave the frosting a gentle pink hue.

The teacher noticed James colouring the worksheet carefully and praised his attention to detail.