Sometimes it's more purple than blue though.
They used a lot of cars and machinery imagery in their music and that's why the influence by Archangel Michael is so heavy.
And if anybody wants to argue with me about the song...
I didn't come up with this myself, someone much wiser told me ;)
It does completely make sense though.
That was always my favorite ZZ Top song, but I do love Rough Boy just as a classic ZZ Top tune.
Hot, Blue and Righteous was sort of a departure from their norm a little bit.
Master of Sparks is great too.