The station was the first in the U.S. territory to transition to color unceremoniously in 1966, followed by WKAQ-TV in 1968. Popularly known in Puerto Rico by its assigned channel number, "Canal Cuatro", the station was also known by its animated cartoon mascot during the 1970s and 1980s, a bongo-playing cat (known commonly as "el gato de WAPA" in Spanish) and therefore its slogan was "Por el cuatro como el gato" (colloquially "on four (legs) like the cat"), which rhymes in its original Spanish. Similarly, another station promo used the phrase, "Hasta el gato, te-ve el cuatro" and the cat itself was alternately known as "el Gato de Cuatro."