Bold markings is not necessarily a morph that is direct heritable. Albino, snow, leucism, etc. are all examples of traits that can be easily and identifiably passed from generation to generation. High yellow, tangerine, and bold markings are all examples of line bred traits, which may or may not be passed on to the next generation. In the case of bold markings, animals with bold spots were bred with other animals with bold spots, increasing the boldness of markings in offspring over multiple generations. Creating the current bold jungles of today took dozens of leopard gecko generations and at least a decade of human effort.
As for the color change, the animal appeared cold in your original photos. If leopard geckos are kept too cold, their colors darken. Now that you (probably) have her in warmer conditions, she will become brighter. It is fairly normal for leopard geckos to have at least some orange at the base of the tail.