Can I change the look of my white label travel portal, like the logo and the colours, myself without hiring a developer?

Yes, most of the everyday look of a white label travel portal is meant to be changed by you, without a developer. Your logo, your colours, your company name, the wording on the home page and the pictures you show at the top are normally settings you edit from an admin panel and save, and the change appears on the live site straight away. That is the whole point of a white label portal. It carries your brand and your name, not anyone else's.

Where it gets more limited is the layout itself. The position of the search box, the way search results are listed, and the steps a customer goes through to pay are built to work in a certain order, partly because they are tied to what the suppliers send back and what they need in return. You can usually restyle those pages so they match your brand, but moving the pieces around, or asking for a page that works in a completely different way, is normally a development job rather than a setting you flip yourself.

Fonts, extra pages and small text edits tend to sit in the middle. Many portals let you add your own pages and change wording whenever you like, while a fully custom design is treated as a separate piece of work and depends on your plan. It is fair to ask for that in writing rather than assuming it is included.

Before you commit to anything, ask to be shown the admin panel where the branding settings actually live, and ask plainly which parts of the design you can change on your own and which ones have to be raised as a request.