Today among women of Muslim countries, Chador is considered as one of the types of, and even the most complete form of Islamic clothing. It is a kind of outer garment worn by women in some parts of the Middle East region, particularly in Iran, Iraq and other countries for outdoor and public use.
As shown in the movies and photos before 1970, black Chadors were rare, and Arab women were rather wearing colorful or light-colored versions.
Chadors were worn at religious ceremonies, and women are still required to put on a Chador when visiting shrines and religious sites.
Among the colors, dark and black Chadors are more effective in providing the best coverage for women outside the home. There is a famous Iranian proverb which goes "there is no color beyond black" which refers to the fact that black is superior to all colors.
According to some statistics provided in 2014, annually more than $100 million worth of black Chadors are officially and legally imported into Iran. Chador is more used by women in Mashhad, due to its special cultural and religious background, being home to the most important religious site in the country, Imam Reza's Holy Shrine, and this is why the city is called "Iran's spiritual capital".
Statistics show that optional hijab among most women is "Chador". This theme has been chosen to display different models of Chadors worn by women in various urban places and ceremonies. In addition, in the photos you see that black is the dominant color in a frame, which in some way indicates that "there is no color beyond black".