I have to add color swatch in custom order attribute in order grid.

[karuna_khatri]

I have to add a color swatch in the custom order attribute column in the order grid column. I have added a custom order attribute in the order grid from this

link. https://www.yereone.com/blog/magento-2-how-to-add-new-order-attribute/ 

now I have to add a color swatch like this in the order grid