shop, entry title size and color

Hello,

Here is CSS to customize page title

.page-title.color-scheme-light .entry-title {
    color: red;
    font-size:12px;
}

Replace the values as per your needs and add the code to Theme Settings > Custom CSS.

Please note, there is no possibility to customize the title only on shop page, this code will change all the pages titles.

Best Regards