What is a wider color spectrum?

The new color space used by 4K Ultra HD can reproduce a 72% wider spectrum of colors than the previous format used for standard Blu-ray. This doesn’t only mean that there are some new colors, it also means that the colors reproduced within the image can be more accurate and more lifelike. This spectrum reduces “banding” artifacts making gradations in color subtle and smooth and closer to what you see in real life.