TITLE: Graph a function of two variables online, with the output rendered as color
QUESTION [1 upvotes]: Are there any online utilities to graph a function of two variables online, with the output rendered as color in some way (for example, red to green, black to white, hue, etc...) Wolfram Alpha comes close, but divides it into discrete colors. I would like the output to still be seen continuously.

REPLY [2 votes]: Wolfram Alpha will do this. What you're essentially asking is for a colour coded contour plot. For instance see here for an example
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