Illustrate a scene from Genesis 38:6 - 'And Judah took a wife for Er his firstborn, whose name was Tamar.' The artwork should be in a digital art style, keeping in mind the historical and cultural context of the scene. Use vivid colors and sharp lines to create an engaging image that represents this moment from the biblical narrative. Despite being digital, the image should still evoke a sense of timelessness, as if it could have been a mosaic, mural, or stained glass window. Please ensure to depict Judah, Er, and Tamar with characteristics indicative of their historical and geographical origins.