How to make UI look nice?

Is there a way i can implement my own textures for stuff like UI buttons, it just seems so bland all the regular stuff, and it seems to be just a solid color and 1 text, what if you wanted a small label at the top of the button as a different color, It’s kinda of hard to explain but not only does it look bland it looks blurry, can i use photoshop to make a texture for it? and if so what are the dimensions, or any other things i should know?

Just change the source image of the panel/button/anything you want to change to your own.
I agree, the default square looks… pretty boring.
Don’t forget to slice the image so when you change the size of the panel/button the picture won’t get squished.