The clavier a lumieres was a musical instrument invented by Scriabin for use in his work Prometheus: Poem of Fire. However, it was never built in his lifetime. The instrument was supposed to be a keyboard, with notes corresponding to colors as given by Scriabin's synesthetic system. Scriabin assigned the following colors to the following notes:

Note	Color
C	red
C#	violet or purple
D	yellow
D#	gray
E	sky blue
F	deep red
F#	bright blue
G	orange
G#	lilac
A	green
A#	gray
B	light blue

However, when the notes are ordered by the circle of fifths, the colors are in order of a spectrum, indicating that he did not experience the physiological condition of synaesthesia, and that it was a thought out system that was influenced by his theosophic readings and based on Sir Isaac Newton's Optics:

Color	Note
red	C
orange	G
yellow	D
green	A
sky blue	E
light blue	B
bright blue	F#
violet or purple	C#
lilac	G#
gray	D#
gray	A#
deep red	F