Change color of Paywall page logo

This paywall page is driving me bonkers. It is very annoying it isn't customizable like every other page.

Anyway, I'm trying to change the color of the logo on just the paywall page and can't figure out a solution. It is currently white on a white background, and I'm trying to change it to black. Any advice?

https://www.studiomefitness.com/nutrition-lifestyle-coaching

Use this code to Website Tools > Custom CSS

body:has(#sqs-paywall-page-root) header#header img {
    visibility: visible !important;
    filter: brightness(0) invert(0);
}