Epoxy Grout Color Help!

Hi everyone,

I am remodeling my bathrooms and need help choosing some grout colors for the two tiles I am doing.

Here is my floor tile (gray tiles): https://www.homedepot.com/p/MSI-Cementino-Gray-12-in-x-24-in-Matte-Porcelain-Floor-and-Wall-Tile-672-sq-ft-Pallet-NHDCEMGRA1224P/307620526
Here is my wall tile (white base with thick gray veining): https://www.flooranddecor.com/porcelain-tile/bernini-avorio-polished-porcelain-tile-100655315.html

I originally wanted to choose Laticrete's Sterling Silver color, however, after scrolling through this sub, a lot of people recommend and are happy with Laticrete's Frosty. Which colors do you think would fit the best for my tiles? I'm also wanting to avoid constantly cleaning my grout so that's why I've been leaning to a gray color. But, is it true I will be frequently cleaning less because I'm opting in for an epoxy grout?

Thank you!