This is not a question of whether it can be done, but a question of necessity. For example, your logo is red. In general, you should use red, and when your background color is also red? Then it must be changed to other colors, such as white, and there are other background colors similar to red. You also need to change the color according to different background colors. However, whether there are black and white colors in your logo or not, black and white are also two different ways to use the logo. As for the rest, whether blue can be used is controversial. If you want to find out this problem, you should check your VI manual, which is generally clearly stipulated.