Hey @gokh,
Thank you for reaching out to us. The header name can be changed by going to Instagram Feed > Customize > Header. The Load more button color can be changed by going to Instagram Feed > Customize > Load More Button. The first icon in your screenshot is not coming from our plugin but it looks like you already removed it as we didn’t see it when viewing your site.
Regarding the color for the header avatar placeholder, you can add the following to our plugins Custom CSS section by going to Instagram Feed > Customize > Misc > paste the code into?Custom CSS?> click?Save Changes.
.sbi_no_avatar .sbi_header_img {
background: #bb4158 !important;
}
Let us know if you run into any issues or have any additional questions. Hope you are having a great night!