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The gradient is a fancy word for derivative, or the rate of change of a function. Itâs a vector (a direction to move) that. 1  Points in the direction of greatest increase of a function (intuition on why)  Is zero at a local maximum or local minimum (because there is no single direction of increase)
A gradient is a combination of two colors displayed as a gradual blend of a color fading into another when a region (in bitmap) or object (in vector) of the mixture is filled with the paint bucket tool. There are three gradient options (shown on the right): horizontal, vertical, and radial gradient fills.