In an effort to reach the coveted under-70 demographic, The New York Times announced Monday it will add color to its traditional black-and-white format next month. 'Having color photos on the front page should really add some razzle-dazzle and youthful energy to the paper,' said Times editor-in-chief Leo Salzberger. 'I expect the new look will be very popular among those born in the 20th century.' Despite Salzberger's enthusiasm, many of the nation's under-seventysomethings are skeptical. 'I may check out the Times when that happens,' said longtime USA Today reader Millicent Scopes, 68. 'But right now, it looks like something my granddad would read.' Salzberger said if the introduction of color is successful, he may experiment with other innovations, including photo captions, page numbers and commas. 