How to remove the color of the plots?

Questions
1
Open in Wolfram Cloud ↗
2

Not sure what you mean by

remove the color of the pictures drawn

With PlotTheme -> "Monochrome"

7586plot.png
7586plot.png450×447 13 KB

With ContourShading -> None

1650plot.png
1650plot.png450×448 19.6 KB

3

Yeah, this is what I meant “no shading” in the plot. Thanks for your reply