What is the official colours used on the 500 and 700 series used by JR West?

[LudwigTails]

Just out of curiosity. Has JR West revealed any sort of information as to what exact colour/paint names they used for their 500 series and 700 series (RailStar)?

It’s whenever they under go full inspection and is given a fresh coat of paint. 

[miyakoji]

The Japanese Wikipedia page says grey, dark grey, and sunny yellow in this section: https://ja.wikipedia.org/wiki/ひかりレールスター#塗装

 

I was looking around for swatches or RGB codes, unfortunately I didn't find anything.