According to Mr. Hall and Mr. Oates, some of the boundaries that separated black and white pop during the last decade seem to be crumbling. They were particularly excited about the ''urban contemporary'' format adapted by a number of big-city FM stations, a format that mixes records by black artists with some records by white American and English new-wave groups, the common denominator being danceable rhythms. In particular, Mr. Hall and Mr. Oates singled out New York's FM stations WBLS and WKTU as forerunners of what they hope will be a more colorblind era of pop radio programming, and pop music in general.

Like the Rolling Stones, the Who, Rod Stewart and other big names, Hall and Oates have acquired corporate sponsorship to help defray the skyrocketing costs of touring. Their sponsor is Canada Dry; the softdrink company is backing their tour with an elaborate advertising and promotional campaign. In exchange, tickets and all advertising carry a prominent Canada Dry logo. ''It helps us keep ticket prices down,'' Mr. Hall maintained. ''If you keep prices down, people will come out to see you.'' People are certainly coming out to see Hall and Oates. Groups with bigger names are struggling to fill concert halls these days, but Hall and Oates have been filling large halls and arenas since their tour opened five weeks ago. They will be on the road through August. Chic's Guitarist Tries Solo Album

Chic, the innovative group that brought a new, stripped-down syncopation and elegance to black popular music during the mid-1970's, has been churning out carefully crafted but somewhat predictable albums lately. So Nile Rodgers, Chic's guitarist and, with the bassist Bernard Edwards, its co-writer and co-leader, decided the time was right to try making a solo album. His project has succeeded handsomely, though perhaps not quite in the way he intended.

Mr. Rodgers's new album, ''Adventures in the Land of the Good Groove'' (Mirage/Atlantic), has already attracted more attention than the last two or three Chic albums put together. The first single from the album, ''Yum-Yum,'' is a hit on black radio and has received even more attention. The trouble is, not all the attention is positive, not by any means.

A number of black radio programmers have refused to play ''Yum-Yum'' because they feel it's obscene. Many black-format radio stations have banned it; others are playing it because it's popular but say they would really rather not. The controversy has made the album as well as the single a hot seller, but it hasn't made Mr. Rodgers any friends among the black music establishment's more conservative elements.