I am not a natural when it comes to being able to distinguish between different shades of the same colour. It has now just become more difficult to differentiate a new shade of blue has hit a market called YinMn. Researchers named the pigment YnMn after its three elements: Yittrium (Y), Indium (In) and Manganese (Mn).
http://www.beautifullife.info/urban-design/dubldom-shelter-beneath-the-northern-lights/ DublDom Shelter Beneath The Northern Lights Located in the snowy hills of the Murmansk region, Kandalaksha, there is a snowy seclusion that offers true solitude. Source: DublDom Shelter Beneath The Northern Lights