We use color-coded frames to represent the colors used for coloring. However, sometimes users might experience that a color that is shown in the painting does not appear in the frame. There are multiple reasons behind this. First, some color has only a light weight in the color combination used for coloring, so the color might not be visualized in the frame. Second, we have trained the coloring neural network with a vast amount of color combinations and paintings. The output of the neural network is not deterministic. This means a color combination (as visualized in a frame) might lead to different coloring results.