Hello,
I saw the screenshot you attached.
1) Unfortunately, there is no option in Theme Settings available to make the warning as a popup. Because the warnings are controlled by WooCommerce and our theme doesn’t influence this.
2) The color variations swatches are displayed fine. It’s because of the color values that are light that’s why they are displayed like that.
You can add borders around the swatches to make them more prominent by adding the following Custom CSS in the Global Custom CSS area under Theme Settings >> Custom CSS.
.woodmart-swatch.swatch-on-single.swatch-with-bg.woodmart-tooltip.swatch-size- {
border: 2px solid #707070;
}
You can set the color according to your needs.
And for the colors over the description please provide with some relevant screenshots to check it myself and help you out accordingly.
Best Regards.