The important bit to take away from this image is that the fall foliage change is definitely under way. But if you want to know more abut yellow I put some information from Wikipedia below.
The word “yellow” comes from the Old English geolu, geolwe, meaning “yellow, yellowish”, derived from the Proto-Germanic word gelwaz. It has the same Indo-European base, -ghel, as the word yell; -ghel means both bright and gleaming, and to cry out. Yellow is a color which cries out for attention.
The English term is related to other Germanic words for yellow, namely Scots yella, East Frisian jeel, West Frisian giel, Dutch geel, German gelb, and Swedish gul.According to the Oxford English Dictionary, the oldest known use of this word in English is from The Epinal Glossary in the year 700.