English to Russian Other Music drumming

1 and 3 on the kick, 2 and 4 on the snare, and quarters or eighths (take your pick) on the hi-hats: this unadorned ostinato is the predominate canvas upon which the art of rock and roll has been painted for decades. While this canvas of 2 and 4 may be everlasting, flexible, and faithful, many of the **colors** and brush strokes utilized for the documentation of rock to recorded medium are not.

Не вполне понятно: что сие значит и почему оно в паре с brush strokes идет?