your monitor needs calibration. Professionals use a machine to help calibrate the monitor. For others, there are calibration softwares that help guide you to calibrating your monitor. I had to do that when i was working on a project and turn out my monitor was very bright. so whatever printed out turn out really dark.
Photographs are taken with a camera, and the color information are stored in the picture itself. so unless u make color changes on it on the computer through your monitor, it will look exactly the same.
If making art through a monitor that is not calibrated properly, what u see on the monitor may be different what it actually is. a calibrated monitor meas that whatever is shown on the screen == whatever is printed out.