How did the scarlet letter on the calendar turn blue and how to change it?

Many users will use the Windows calendar in the lower right corner when using the computer, but many users find some fonts difficult to recognize when using it, especially the date of the lunar calendar and some festivals and solar terms.

If you only want to modify the text color of the festival or solar terms, please select the color from the menu on the left side of the personalized theme page. If you don't like it, click on the custom color below and choose a lighter color.

In this case, the colors in other places may also change, for example, when inputting text, the text background of that input method may also be the color you set.