Nanoscale textured surface except instead of being carbon nanotube "whiskers" (black) the "whiskers" are lazurite crystals (blue).-- sninctown, Mar 27 2020 "Structural color" paint http://physicsbuzz....uld-create.html?m=1 [xaviergisz, Mar 28 2020] The Bridge of Death https://m.youtube.com/watch?v=Wpx6XnankZ8The first two questions are easy. [8th of 7, Mar 28 2020] What [bigsleep] said.-- pertinax, Mar 28 2020 We need a VANTA Black Man Group.-- RayfordSteele, Mar 28 2020 Why blue, not red?-- Mindey, Mar 28 2020 Because you don't want to be hurled to your doom from the Bridge of Death, presumably...
<link>-- 8th of 7, Mar 28 2020 That's an expensive Fanta. Mixgeology.-- wjt, Mar 29 2020 [+] 'cuz the name's cute, but horrible science : if you had a "vanta" nano-structure, it'd be black, that's what it does.-- FlyingToaster, Mar 30 2020 Could plasmonics make a bluer blue than diffraction, or a blue photovoltaic power minute LEDS or lasers-- beanangel, Mar 30 2020 ^ Intricately complex structure that converts all* forms of energy to a specific band of blue? The needed blue. Some out of solar system minerals may be a requirement.
*most-- wjt, Mar 31 2020 Due to the inherent inefficiencies of photovoltaics, an absorptive - re-emissive system is always going to be less efficient than simple reflection of desired wavelengths.
Reflecting only desired wavelengths, but also absorbing all other undesired incident energy and re-emitting on that desired wavelength will indeed produce a "brighter" colour.-- 8th of 7, Mar 31 2020 random, halfbakery