Here in Spain we still haven't shaken off Franco's misuse of the Spanish symbols, mainly the flag and the anthem (which remains without words to it, the only one on Earth). Anyway, those like me (late thirties, early forties) still remember songs from that time. One of them dealt with the flag:

Como el vino de Jerez y el vinillo de Rioja son los dos colores que tiene la banderita española.

Banderita tú eres roja, banderita tú eres gualda. Llevas sangre, llevas oro en el fondo de tu alma. El día que yo me muera, si estoy lejos de mi patria sólo quiero que me entierren con la bandera de España.

(The colours of the Spanish flag are like the wine from Jerez and the wine from Rioja.

Dear flag, you are red dear flag, you are yellow, bearing blood and gold in the bottom of your soul. The day I die if I'm far from my motherland No other thing I want but to be covered by a Spanish flag.)

One wonders who the gold and blood belonged to...

Cheers