The blue in LEDs was also the last (and most difficult) color to be developed. According to [1], it actually won a Nobel Prize.<p>[1] <a href="http:&#x2F;&#x2F;sitn.hms.harvard.edu&#x2F;flash&#x2F;2014&#x2F;why-the-blue-led-should-light-up-your-life-and-won-a-nobel-prize&#x2F;" rel="nofollow">http:&#x2F;&#x2F;sitn.hms.harvard.edu&#x2F;flash&#x2F;2014&#x2F;why-the-blue-led-shou...</a>