As the title suggests, I'd like to change the color of the logo on the project pages, but not the portfolio page. As it stands, it seems like the page header code injection affects the portfolio and project pages, with no way to separate them out. I'm using the following code:

<style>
  .header-title-logo img {
    visibility: hidden;
}
.header-title-logo a {
    background-image: url(https://images.squarespace-cdn.com/content/65a0493c0ac23a500b538521/1231deef-3f2b-45d9-80d7-e7132dd00e9a/ears+up+logo+white.png?content-type=image%2Fpng);
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center center;
}
</style>

Is there a way to isolate this to the projects but not the portfolio index?

Yes, it can be done with custom code.

Please send the links to the pages you want to have a different logo

You can target the project main page by adding class ".view-list" before the class ".header-title-logo" and for project individual pages by adding class ".view-item".

@paul2009 This did the trick! Thanks so much.