Scientists have also predicted, with mixed results, a preference for red among women, who would've needed to spot red berries against green foliage in our ancestral hunter-gatherer societies.

Green: Because of its association with nature and foliage, green in design can be used almost like a neutral colour: greens never clash with red or pink roses, yellow sunflowers, lilacs or bluebells.

Yellow, green, orange and coral foliage line this lively forest path in Minnesota.