to Import swatches from CJM Pre-Select Colors Plus Swatches extension for Magento 1 into Magento 2
Create pub/media/attribute/swatch/colorselectorplus and upload all your images under media/colorselectorplus/swatches/ (Magento 1 installlation). and then run the SQL statement:UPDATE `eav_attribute_option_swatch` SET value = concact('/colorselectorplus/',option_id,'.jpg')