Here's the video guide for the addon - Color Swatches:
Step 1: Go to Apps > Debutify
Step 2: Click on Color Swatches
Step 3: Click on Install Add-On
Step 4: Once you've installed, Go to Customize > Theme Settings > Color Swatches > Activate and Write Color Variant Name
Step 5: Please make sure to write same Color Variant Name as written in the Products Section
Step 6: Go to Online Store > Theme > Actions > Edit Code
Step 7: Click on 'Add a new asset'
Step 8: Click on 'Choose file'
Step 9: Browse and select the color scheme. (You can save it from Google and it could be of any dimension) Make sure you save it in the same format as select in the Theme Settings > Color Swatches i.e. JPG
Now: Color Swatch Color will change accordingly :)
Go to All Products > Select the product where you would like to use the color saved in Asset. Write same name as mentioned in the Asset file