In May of 1980, Simon & Schuster launched Silhouette Romances as a direct competitor to Harlequin's popular Presents line. S&S poured millions into the launch to show they were serious, including hiring Ricardo Montalban for their TV commercials:
Harlequin had pioneered the use of TV to market romance novels during their dominant period in the 1970s. It's interesting to note the similarities in wording between the Silhouette ad and this circa 1976 Harlequin ad:
Ads weren't the only thing Silhouette copied from Harlequin. The cover design for Silhouette's launch titles was so similar to the design being used for Harlequin Presents that Harlequin went to court to get an injunction against S&S. You can see the similarities here:
Silhouette eventually relented and added its familiar purple border in 1981. In a bit of #RomanceHistory kismet, the last book with the old cover was Nora Roberts' first, Irish Thoroughbred, and the first with the purple was Janet Dailey's first for Silhouette, The Hostage Bride.
Dailey and Roberts of course became inextricably linked in #RomanceHistory when Dailey was discovered to have copied large portions of Roberts' Sweet Revenge in her 1997 book Notorious.