Left Toolbar > Convert Nodes > To RGB
The To RGB node converts the input image into an RGB image.
input
Img in LAB color space
output
Img in RGB color space
On the left toolbar choose Convert Nodes > RGB. >
Drag the To RGB icon into the Node Graph.
Connect the output of an image node into the Img input in the To RGB node.
Img
The Image to convert to RGB color mode.
Img
The RGB image.
Keep Alpha
If checked, the alpha channel of the input image is passed to the output image. Generates an image of RGBA color mode.