(This tip for Ghost Platform)
To change logo on One Page, you can follow these following steps
#1. Edit page you want to change logo > Scroll down to bottom > Click Plus icon
#2. Choose HTML card
#3. Paste this code and Save
<style>
.gh-navigation-brand img {
content: url(https://cdn.pixabay.com/photo/2023/09/10/11/44/tulip-8244705_1280.jpg);
}
</style>