Saccharine colours

1. Does the highlighted section imply "as representations that both 1. seduce because of their phallic power and their rejection of castration, and 2. seem rusty and decaying because of the deliberate flaws that are seen in their printing and their saccharine colours that evoke a feeling of sickness"?

2. What kind of colors are "saccharine colours"? And does "saccharine colours testifying to something sickly" mean

a) saccharine colours that evoke a feeling of sickness

or

b) saccharine colours that make Marilyn Monroe look sick?

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Context:
As constructed by fetishistic voyeurism, her image oscillates between static beauty and its disintegration. A typical example here would be Marilyn Monroe, whose smiling image circulates in Andy Warhol’s screen print series as representations that both seduce in their phallic power, warding off castration, but at the same time seem riddled with decay, the mechanical reproductions deliberately exhibiting the flaws of the printing process, their varying saccharine colours testifying to something sickly.