Evaluating curved surface

Namaste all,
A small question, this is the first time I am evaluating a surface for its curvature, and used the gradient tool.
I have used blue color for the lowest curvature and red for the highest. Does it mean that the panels in blue color are totally flat and the ones in red are curved in both the axis?
Hope I was clear asking the question.
Thanks!!
Capture|690x316

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Looking at your picture Iā€™m 100% sure, the blue ones are not flat.

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