Off-color and Porno

Off-color adjective - Hinting at or intended to call to mind matters regarded as indecent.

Porno and off-color are semantically related In some cases you can use "Porno" instead an adjective phrase "Off-color".

Porno noun - Creative activity (writing or pictures or films etc.) of no literary or artistic value other than to stimulate sexual desire.

Off-color and porno are semantically related in obscene topic. Sometimes you can use "Off-color" instead an adjective "Porno", if it concerns topics such as pornographic.