A Minolta spectrophotometer CM-3500d colorimeter (Minolta Co., Ltd., Osaka, Japan) with Spectra Magic version 3.6 software was used to measure the colour of rice samples. The colour was expressed using the L, a⁄ , and b⁄ colour space coordinates, where L represents lightness, +a⁄ redness, a⁄ greenness, +b⁄ yellowness, and b⁄ blueness.