A lovely 'Regenbogen' hung in the showery heavens opposite our house today.
I wondered if there is a German mnemonic to remember the order of the colours of a rainbow, but all I could come up with on the net is the acronym 'roggbiv'. This stands for: rot, orange, gelb, grün, blau, indigo und violett.
Not quite the same as 'Richard of York gave battle in vain', though I also found this little rhyme: 'Rote Orangen, Gelbes Gras, im Blauen Dunkel Viola saß' which is quite sweet (here indigo is replaced by dunkelbalu - dark blue).
Whilst looking for German mnemonics, I also found this one for remembering the order of the planets in das Sonnensystem:
'Mein Vater Erklärt Mir Jeden Samstag Unsere Neun Planeten' = Merkur, Venus, Erde, Mars, Jupiter, Saturn, Uranus, Neptun, Pluto.
In translation: Every Saturday my father explained to me about our nine planets.
Shame that Pluto isn't classified as a planet any more!
By the way, I note that the German word for a mnemonic is 'eine Eselsbrücke', literally a bridge for leading donkeys over, where 'Esel' also means an ass or a blockhead!