Yellow is put

Yellow was the colour that distinguished the cars driven by Belgian drivers in automobile competitions in the beginning of the twentieth century, in the same way as red represented Italy, bleu for France, the British Racing Green and white (later metallic grey) for Germany.

One Belgian driver only participated in the very first Grand Prix in the history of the F1 World Championship at Silverstone in 1950: Johnny Claes in the Talbot T26 (picture above), while the last appearance for a yellow single-seater was at the 1964 Belgian Grand Prix at Spa with the Scirocco of veteran André Pilette (picture below).