Off-color and Sickish

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

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

Sickish adjective - Affected with nausea.

Off-color and sickish are semantically related in not healthy topic. Sometimes you can use "Off-color" instead an adjective "Sickish".