Analysis of information sources in references of the Wikipedia article "Points classification in the Tour de France" in English language version.
2.6.018 - [...] If a rider is leading more than one classification, the order of priority of the distinctive jerseys shall be as follows: 1. general classification by time; 2. general classification by points; 3. general climber's classification; 4. others (young rider, combined, etc.); the order of priority among these other jerseys shall be set by the organiser.
2.6.018 - [...] In this situation, the organiser may require another rider next on the relevant classification to wear a jersey which is not being worn by the leader of that classification. However, if this rider must wear his world or national champion's jersey, or the leader's jersey of a UCI cup, circuit, series or classification, he shall wear that jersey.
There is an established order of priority for the different leaders' jerseys: the yellow jersey, followed by the green jersey, then the red polka-dot jersey and finally the white jersey
When a rider is leading several classifications, he naturally only wears one jersey: the one designated by the order of priority. The other jerseys are then worn by the riders lying 2nd, 3rd or 4th in the corresponding classification
However, if this rider is required to wear his world, continental or national champion's jersey, then he will wear this jersey
It owes its colour to its first partner, La Belle Jardinière, a chain of clothing stores established in the 19th century
2.6.018 - [...] If a rider is leading more than one classification, the order of priority of the distinctive jerseys shall be as follows: 1. general classification by time; 2. general classification by points; 3. general climber's classification; 4. others (young rider, combined, etc.); the order of priority among these other jerseys shall be set by the organiser.
2.6.018 - [...] In this situation, the organiser may require another rider next on the relevant classification to wear a jersey which is not being worn by the leader of that classification. However, if this rider must wear his world or national champion's jersey, or the leader's jersey of a UCI cup, circuit, series or classification, he shall wear that jersey.