English:

Opposite colors and opposite brightness cause our vision to malfunction. For example: Dark 

Red, and Light Green, Dark is opposite of Light, and Red is opposite of green. I also noticed brightness tend to effect our vision more, and opposite colors don't effect that much. If there isn't a brightness difference it likely won't cause problems. Usually if the color is same and brightness different it can cause debates of if the picture is slanted.

For my dad:

红色和浅绿色,深色与浅色相反,红色与绿色相反。我还注意到亮度对我们的视觉影响更大,而相反的颜色影响不大。如果没有亮度差异,可能不会造成问题。通常如果颜色相同而亮度不同,就会引起图片是否倾斜的争论。