Product Variant Option Selector Change Font Size and Color

Looking to change the Variant drop down selector menu font size and highlight color. See image attached.
Specifically looking to change "Select Color", "Pearl", "Champagne" Font size.
And to change the highlight color different than blue.

Link to site:
Version 7.1
https://www.raehcollection.com/shop/p/wana-earring-threader

You can use this to Website > Website Tools > Custom CSS

.ProductItem-details .variant-select-wrapper select, .ProductItem-details .variant-select-wrapper select *, .product-details .variant-select-wrapper:before {
    font-size: 10px !important;
}

With color, I think there is no way to change it, browser/device control color, each devices (Windows/iOS/Mac) will have a different color.

Thanks as always Tuan for the amazing assistance.
That's interesting re: color. I'll stop obsessing about that then I guess:)

Re: Font size-  In Mobile Mode that code effects the size of the variant "Select Pattern" and "Select Threader Length" selection area (see blue box items in photo). But it does not effect "Select Threader Length" in the drop down menu (see red circle in photo). Basically I'm trying to avoid the text wrap-around in mobile mode by lowering the font-size of that section specifically. Any thoughts?

Interestingly enough in Laptop mode that code does effect font size in both the blue square and red circle area. 🤷

It looks like mobile device control this, it shows different on Samsung

Hmmm... interesting. Unfortunate but what can ya do. Thanks so much for digging in deep on this one.