Brightness Error with Importing Image

I have an image that I want to make as a background. I take my image and drag it out onto a quad, and the image gets totally dark.

Do you see the difference between what’s in the Scene View and the Preview in the bottom-right? I’ve tried looking at the game view and the same problem happens. I have no idea what’s wrong. The import settings are at the right. Should I add a script to make it brighter? Do I have to add or change the shader? The shader I’m using is the default one (Standard Shader). This has had me stuck for days so if you could help that would be great!

This will be because by default the material that will have been assigned to the quad will be a lit shader, meaning its subject to the scene lighting.

Select the material that has been assigned to your quad and swap its shader to use an Unlit shader, this will then display the image at full brightness.

Alternatively you could change the lighting settings of the scene/add some lights in if you do want it to be subject to lighting conditions.