In 1952, Miss Jane Ott began compiling a list of Arabian horses whose lineages were believed to be directly descended from horses in the desert. This list, known as the "Blue Catalog," was later carried on by Al Khamsa, an organization dedicated to preserving Arabian horse bloodlines. 

The Blue List aimed to identify and document Arabian horses considered to be an "asil Arabian" meaning their lineage could be traced directly to horses from Bedouin tribes or exceptional individuals known for their dedication to preserving pure Arabian bloodlines. Later the Al Khamsa organization in the USA and Asil Club in Europe continued the work adding more horses that matched the criteria of an asil Arabian, although not every Arabian horse entered in the Al Khamsa or Asil Club is considered Blue List. While the core principle of the Blue List focuses on direct desert lineage, Al Khamsa and the Asil Club have sometimes accepted horses that may not be listed in the original Blue Catalog but still meet their criteria for purity.

Within the straight Egyptian Arabian horses there are a number of lines which are not considered "Blue list".

The best known example are the Bisharat horses. These horses were purchased by a horse trader from the Trans-Jordan Frontier Force when it was disbanded in 1948 and sold to the Inshass stud of King Farouk of Egypt. The isue is that there was no asil breeding program at the Trans-Jordan Frontier Force in Acre so if asil, they could only have been horses that bedouin soldiers brought themselves. Unfortunately there is no mention of their breeders, and no direct connection to the Bedouin.

 

These horses have bred on within the straight Egyptian Arabians through Badr and Bandong and feature in the pedigrees of some well-known horses like Hanan (Alaa El Dine x Mona), Ali Valentino (Ruminaja Ali x Moniet), Orashan (Messaoud x Ora), Orashan (Maysoun x Orasha) as well as the "new Egyptians" at Marbach through Bilal I. Thanks to Hanan, it is today becoming very hard to find straight Egyptian Arabans that are not tracing to the Bisharat horses. Their descendants are recognized by Al Khamsa and the Asil Club but are not considered Blue List. You can read their detailed history in the following article: "On the trail of the Bisharat Horses: the Government Stock Farm, Acre, and the Trans-Jordan Frontier Force"

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Another widespread stallion that is not Blue list is Nasralla. Although his asil status is meanwhile cleared, he was for a long time very controversial. Today his blood is also widely spread in the straight Egyptian Arabians, mainly through his gread granddaughter Bahila who produced horses like The Minstril and Coaltown. The line has even become more widely spread through The Vision (dam of the Ariely stallions Al Lahab and Al Ayal). Their descendants are recognized by Al Khamsa and the Asil Club but are not considered Blue List.

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Another line that is not documented is that of Bint Kareema. She was bred at Kafr Ibrash Farm by the Queen Mother Nazli, sired by the Blunt stallion Rasheed out of Kareema. From Kareema nothing is known except that she had been sired by a Dahman out of an Obeya  (which makes her probably a full sister of Ibn Farhan, the stallion exported by the Queen Mother to the USA). The line is widespread in Europe through the Kauber Platte mare Hania (Tuhotmos x Hodhoda), in the USA through Ibn Farhan and El Badr (Adl x Daab) a descendant in Egypt is a chief sires at El Zahraa today. Bint Kareema is accepted by the Asil Club (Kauber Platte was a founding member) but not by Al Khamsa.

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Although they are not documented (yet), it does not mean these horses are not asil. The chances are indeed slim that in those days a horse trader would dare to present an Arabian without credentials to the royal family in Egypt .