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The term “royal Blue” first appeared between 1810-1820. The name “royal blue” comes from British royalty. This shade of royal blue was created by a British tailor for a competition in order to create a dress to be worn by Queen Charlotte at the beginning of the 19th century. Over the years, royal blue has undergone a change. The original royal blue used to be much darker than the one that was officially approved by the World Wide Web Consortium in the 1980s. Blue Sapphire of the blue is what they called “Royal Blue”. The colour most closely related to royal sapphire is the original royal blue, which appears on the United Kingdom flag. Royal Blue describes sapphires that have the most vibrant and deepest saturation. The British used it to describe sapphires when Ceylon and Burma were part of the British Empire. The colour blue, which is also the colour of the ocean and the sky, is known to evoke feelings of tranquility. The colour is associated with importance, significance and self-confidence. Blue corporate suits and blue uniforms are all derived from here. The sapphire's value is largely determined by its colour. Royal blue describes sapphires that have a very vivid, intense, or dark blue colour. is a good resource for more information. Clarity plays a big role in the value of a Sapphire. Royal blues sapphires need to be flawless. The colour uniformity has to be excellent. Cut plays an important role in determining a sapphire's colour. To maximize total internal reflection, royal blue sapphires must have excellent or good proportions. If viewed upside down, the sapphires are not to show windowing and/or extinction. The classification of a gemstone's colour is both an artistic and scientific endeavor. The adjective “Royal” encompasses many different facts about sapphires. It's not as easy to determine the color of a transparent anisotropic sapphire. For the sapphires to be considered royal blue, they must meet certain criteria. The blue colour in sapphire comes from the presence of iron with pairs of titanium. It replaces some of the aluminium atoms in the structure, the more iron and titanium pairs, the bluer the sapphire all the way to black. The approximate iron and titanium content in most blue sapphire is between one to couples of tens of pairs of atom per million. Two other chromophores almost always play a role in blue sapphire: iron and chromium. The iron tends make sapphires more green, reducing the saturation of the blue color and increasing their tone. Chromium is what makes the sapphires violetish. Quantifying chromophores is an excellent way to compare colours without having other factors influence the results, such as the reflections or the path of the light through the sapphire. By combining the method with the overall dimensions of the stone we can analyse and compare the most influential color factors to our reference collection “Royal-blue” sapphires. Royal blue sapphire must be heated or not treated. Therefore, any other treatment such as diffusion of foreign ions into the sapphire lattice, like beryllium or titanium, fracture sealing with resin, or lead, cobalt and/or silicate glass, will not be granted a gemmological report and as such not qualified for Royal blue or any other colour grading.