Coles has 1/2 Price all Rimmel cosmetics and 30-40% off L'Oreal Paris cosmetics this week. The catalogue only listed 1 Rimmel item at 1/2 price but it turns out that it's the whole range, and L'Oreal wasn't mentioned at all.
Coles pricing for cosmetics can be a bit off sometimes so I'm hesitant to say that it is exactly xx% off. If you go by their prices and savings it seems to suggest that prices are 45% off - I'll just say 30-40% off to be conservative. For example Coles seems to be suggesting that this Nude eyeshadow palette is normally $32.95 when I know it's RRP is $29.95.