When shooting colors such as pink and orange with Canon 600D camera 18-55mm, the color difference is very heavy. What is the reason?

Make sure that your monitor can correctly display the color, brightness and contrast of the image. Professional graphic displays must be calibrated by colorimeter before they can be said to look good. Without colorimeter calibration, the display cannot determine brightness contrast and color. Imagine that if you just adjust the red, green and blue colors of the display, the picture will be very beautiful. However, the actual picture itself has not changed. Can you guarantee that the other monitor is the same as you? Therefore, it is impossible to use an uncalibrated display as a basis for correct color and exposure.

The LCD screen of the camera is only used to view and display thumbnails, and it can't reflect the actual situation of the picture. No matter its resolution, color or size, it cannot be displayed as a picture.

That's called color management, and display calibration is only a part of it, which runs through the whole photography workflow, including software and hardware, such as PHOTOSHOP, which requires color management settings.

White balance is the balance of white. The adaptability of CCD is not as good as that of human eyes. If the color adjustment of the camera is inconsistent with the color temperature of the scene lighting, color cast will occur. White balance is to adjust the color circuit inside the camera to offset the color deviation, which is closer to the visual habit of human eyes. White balance can be simply understood as that the standard white shot by the camera lens is still white after circuit adjustment under any color temperature condition.

There are also high-end digital cameras that usually support ADOBE RGB color gamut, which is wider than SRGB color gamut. If a wide color gamut display is used, the colors of digital photos with ADOBE RGB color standards can be accurately displayed on the display. If you use an ordinary SRGB monitor, the color may be lighter.