Winkelwagen - Ticketpartners

When compiling the file /home/ticketpart/domains/ticketpartners.nl/public_html/templates/yootheme_tp/scss/custom.scss
The error detected is: $color: none is not a color. , 1008 | background-color: rgba($background-color-div, 0.3); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ' - 1008:29 root stylesheet