Visa (BankAmericard)
In mid-September 1958, Bank of America (BofA) launched its BankAmericard credit card program in Fresno, California, with an initial mailing of 60,000 unsolicited credit cards. The original idea was the brainchild of BofA's in-house product development think tank, the Customer Services Research Group, and its leader, Joseph P. Williams. Williams convinced senior BofA executives in 1956 to let him pursue what became the world's first successful mass mailing of unsolicited credit cards (that is actual working cards, not mere applications) to a large population.
Whereas the first BankAmericard cards were white-ish (above), the card design was soon changed, and the iconic blue, white and gold (the colors from the logo on the first card) design was established (left).
(Source: Wikipedia)