There are only black and white color on adobe premiere

I'm attempting to make a gradation as a project and I have to adjust the color of scene with various colors. However, on my computer, there are only two colors which are black and white. I wanna choose some different color such as red, blue or orange, but I can't. I have checked every system or any other things that are associated with the adjustment of colors though, to me there's nothing wrong. Additionally, when I click the eyedropper on the effect "change to color", changed the color to yellow and I dropped it, the color just automatically changes the color to black or red. How do I choose other colors instead of black and white?