mdb-ui-kit/src/scss/pro/_variables.scss defines some chip and chips related variables starting with the // Chips comment.

However, mdb-ui-kit/src/scss/pro/_chips.scss has some properties hard-coded such as background-color: #eceff1; instead of using $chip-background-color. Also, for the padding, $chip-padding-right is used in the chip itself (for both sides, not only right as the variable name implies), but if there is an image, it's pulled to the left using margin: 0 8px 0 -12px;: the -12px is hard-coded so if the $chip-padding-right variable is changed, the image looks off.