To make your QR code stand out, you should use a solid color. You should also try using black and white colors. However, you should avoid using light colors such as light blue and yellow. In addition, you should make sure that the background behind your QR Code is solid. Make sure that the background behind your QR Code is not something like a thin white line.
Also, you should not place your QR Code on a background that has a dark colored pattern behind it. That will distort the image and cause problems with QR code shapes recognition. If you want your QR code to be recognized easily, it is a good idea to use the same size text for your code as well.
If you are going to use text, use bold, italic or underline fonts and use double spacing to make your QR Code more recognizable. You can also use a square or circle shape instead of a triangle.
There are many different ways that you can make a QR code stand out and make it easier for people to scan it. A solid color background with bright colors is one of the easiest and most popular ways to make a QR code stand out.