By @sternenblut: Side by Side Swatches; Rebel (Pink Plum, Satin Finish) on the left, Açai (Vivid Deep Violet, Matte Finish) on the right. Açai is slightly darker and with a hint of a blue Undertone. Acai lasted five hours up to now and still going strong. Furthermore the Swatch left a Stain on my Hand.