Can someone tell me what color shirt this gray suit is made of? Not white. .

Personally, I don't think the beige brown shirts mentioned by the previous two are suitable. Because those two colors are very neutral, like gray, they are used to set off other colors, so they are not ugly to match, but they will be boring.

Gray is well matched with purple, wine red, emerald green and dark blue, because gray can set off the low-key extravagance of this color.

In addition, strong red, green and rose colors are actually no problem, because they can still set off the protagonist.

In fact, gray and black and white gray can be matched. However, considering that this gray is already dark, it may be more layered with light gray (wearing white may look more business). If the coat is dark gray and the shirt is light gray, consider wearing special pants, such as the purple and burgundy mentioned just now.

If you want a stronger layering, you can consider a burgundy cardigan+light red shirt, or purple+light purple, etc ... through color contrast, you can add some exquisiteness.

COCO also talked about printed shirts. In fact, it doesn't matter whether they are monochrome or patterned. As long as the main color of the shirt is the one I just mentioned, it is generally ok to wear. (It actually goes well with gray. The colors I mentioned are just a few common examples. You can try more colors similar to what I said (especially those with gray feeling). After all, there are hundreds of thousands of colors ...)