If you need to customize the styles of the app beyond the options that are available to you in the app settings, you can use the "Custom Styles" field to apply your own custom styles.
The Custom Styles field is located at the button of the Settings > General page.
Classes and IDs for the elements that make up the accessory widget,
Heading Styles
#accessories-container-heading {}
Intro Paragraph
#accessories-info-text {}
Accessory Items
/*container that sourounds all items*/
#accessories-items {}
/*container that sourounds each individual item*/
.accessories-item {}
/*left section - contains checkbox and images*/
.accessories-left {}
/*Checkbox Styles*/
.accessories-left input[type=checkbox] {}
/*image wrapper - contains the image tag*/
.accessories-img-wrapper {}
/*image*/
.accessories-img-wrapper img {}
/*quick view link*/
.btn-accessories-quick-view {}
/*right section - contains product title, description, pices and options*/
.accessories-right{}
/*Accessory Product Title link*/
.accessories-title {}
/*Variants selector*/
#w3-product-accessories .single-option-selector {}
/*DropDown Styles*/
.accessory-variant-select {}
/*Accessory Price*/
.accessory-price {}
/*Accessory Quantity*/
.accessoryQuantity {}