Hi Misam,
Sorry for the delay. The image and the color info are stored in the term meta table.
The default WooCommerce export tool doesn’t export the term meta. It only exports the product meta.
I believe there could be two solutions then:
1. Export the whole database using the default option from WordPress Tools > Export
2. Using a third party plugin to export the taxonomy and the term meta. I’ve never tried but instead of WP ALL import you could try WordPress XML & CSV Export Plugin – WP All Import or WP Import Export Lite – WordPress plugin | WordPress.org for example