MAC Butterscotch Eyeshadow ($15.00 for 0.05 oz.) is described as a “matte warm beige [with a Matte finish].” It's a light-medium, muted yellow with warm, orange undertones and a matte finish. It had a soft, finely-milled texture that was just a smidgen powdery. It wore well for eight hours before starting to fade. Bobbi Brown Banana (LE, $22.00) is yellower. See comparison swatches / view dupes.
FURTHER READING: Formula Overview, which is a detailed review of the range as a whole.