Currently when I use cmd.exe the red color is too dark and the blue and green colors don't apears. In other computers I don't have this problem. Using c:/windows/syswow64/cmd.exe in my computer I don't have this problem.
Previously I didn't change anything.
How I get normal colors?
The answers of the question How to reset the looks of the Command Prompt window, in Windows? refers to reset all the look. I need only to undertand the colors.