Colour can have a strong influence on one's psychological mood. I think the red colour of the skin of an apple would actually affect the taste of the apple, as compared to a peeled fruit. Fragrance is mostly about psychology, it seems to me. Therefore it is natural for a designer to use, or at least be aware of the influence of colour in the design of the product and the container.
In some cases, you can't actually see the colour of the juice because of the design of the container. Even so, the colour of the container will have an effect on the user. The psychological element of fragrance is so important, it is only natural for a perfumer to use colour to enhance the image of the product. For example, the brown tone of Fille en Aiguilles really gets you ready for the autumnal, smoky dried leaves and pine needles of the fragrance. When the juice itself has a noticeable colour, I think it really helps to personalize the experience of the fragrance. You are not just using something from a container of a certain colour, you are actually applying the coloured fragrance to your person. This must enhance the effect of fragrance for most users.:coolold: