At times I want to meet people. Meeting people is a joy. People are life itself. I want to live with others and I have to share my joy with them.
Whereas Belonging (brown) holds no risks because one withdraws within the group, Conviviality draws one out of one's Self towards the others.
As Dick Swiveller says in
The Old Curiosity shop: "Fan the sinking flame hilarity with the wing of friendship; and pass the rosy wine."

Conviviality is the need to open up socially, to really share emotions with others, to have a good time together. It means letting go of social differences. It means having the courage to interact, to take social initiative. It is the need for romance, for intimacy, and for ... vulnerability.
Linguistically, yellow has many negative meanings that are historically determined. However, yellow is also the colour of the bright sun, which children love to decorate their paintings and drawings with. It is the sun-drenched beach where we love to go on vacation. This symbolism is based onexperience, and is what convinced us to choose it as the colour of conviviality.
Yellow is also the colour of egg yolk, intimately side-by-side with the white, like the Self and the Others, in a convivial atmosphere. Conviviality enriches life, like gold, the "yellow metal" it stands for in the flags of many nations in the world.
In Belgium, the ordinary Yellow Pages are called the convivial Golden Directory, a directory that promises to help you get what you have always wanted.

People often mention orange and yellow as symbolical expressions of optimism, warmth and cheerfulness. Orange, which stand for Pleasure in our model, is not so far removed from conviviality. The important difference is that conviviality knows no social limits but pleasure seeking can be rather egotistical, if not anti-social.
Yellow, oddly enough, is not a very popular colour, and historically determined meanings, expressed in disparaging terms such as "yellow journalism" and "Yellow Peril", are to blame for it, especially, or even exclusively, in the west.