In Jimi's personal writings he used a number of Bob Dylans' key metaphors. Principally the sea, the road, the rain are themes of alienation and apocalypse which were the back bone for many of his songs. Jimi was interested in the esoteric signifigance of colors. The power of color, and the expression that lies behind terms such as 'green with envy','seeing red', and 'feeling blue'. Jimi speaks of 'purple, red, yellow, and blue'.
Purple rays make the individual a self ruler.
Red is the color of the pioneering spirit. Green is the ray of balance and harmony, which is only achieved through conflict and struggle. Yellow is the color of creativity. Jimi also used numbers in his symbolic lyrical poetry. The numbers 6, and 9, were developed into thought after researching the I Ching.