[ 紫+绿[买一送四] ]

[ 白+灰[买一送四] ]

[ 黄+蓝[买一送四] ]

[ 红+红[买一送四] ]

[ 黑+灰[买一送四] ]

[ 绿+灰[买一送四] ]

[ 深绿+绿[买一送四] ]

[ 桔色+蓝色[买一送四] ]